Malicious PDF — malware analysis report

Static analysis result for SHA-256 245c0fbf27f412f6…

MALICIOUS

PDF

85.8 KB Created: 2021-07-05 12:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8a338b85450a6d3ee4591d74aad17f77 SHA-1: 79a3d46cd048aa0fd45f1f7bed97fff6558110cd SHA-256: 245c0fbf27f412f6f03d8c74e862914cde62360008f940c1225bf0596a892491
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links to external websites, many of which appear to be compromised WordPress installations, suggesting a tactic to distribute malicious content or phish for information. The document's structure and heuristic firings strongly indicate a lure for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9762

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crewmak.ru/uplcv?utm_term=euro+to+aed PDF link annotation
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/e48a77c17fc0f6219901072ac8719c4f/lumegaf.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c65a69b25d---fenepuz.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/46067055699.pdfIn PDF document text
    • https://mnlex.it/file/8203838446.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/6u73v2mdp3f4jabgqeq9tck7s6/xomasazevapavonerodefale.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/gokawigaxeruwulituv.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/e4445ms7i88qhvp9vnivoivfvg/lesagowaduvijepetavune.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608b45abccec4---repidubefizatiwukolo.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609b680ddfc2e---31872865208.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3487a43de---xotasivuwuponizozu.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c11d5c439---sutorulozegawurepusavonig.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/basutefexaru.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607998a615cab---47358924138.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/2cfaa77483ed86c44f7297d91f07b399/23520382692.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/hntgeob44n5qoc6c1rpp0vbccn/vutebigenid.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/3fca1629df59656660e711695d040beb/gamuzidimalubuv.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/ec07878b01dbf8d2945a2edfb23527d0/40936949960.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/9011118ae8d3ec46284eb4d832081a07/11111632236.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/qcqc71preofr0ft1a9budpafa4/84464747576.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/6217387517.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/1b6bbbb8a27e8fe2c9c79d75fa3a3a69/29244326720.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/a90c62ce5ed7882c8b611e52d7f5d6ba/dinurawabosagozejerix.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/60450935384.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/tpb7on4dbt8cm875sj01atrft5/48322933282.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fd3ea906e---dotimodawugagopuze.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2896d22038---72100910036.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/siwem.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56E 26440 bytes
SHA-256: aaf98e4e8e745fbbbc447944fbfa5a087217a4a1cbd494b57653ce8175cde7e2
font_02_sfnt_off00011d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D74 16224 bytes
SHA-256: f16fabb0aeb7cb637f0b528602d0ea764a69c63e0d6ffde2c5fa4f8fe93bd876
font_03_sfnt_off00013361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13361 9916 bytes
SHA-256: c7f9e38297a0ec2591c32508a307e63be89f7a88c081a18bf7892a7f303a076a

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