Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe02d8ff9cfa243…

MALICIOUS

PDF

71.2 KB Created: 2021-07-07 03:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: bf6b2c3423a70500fd1355a5b04d2b41 SHA-1: a5e7107199336f8f6f6d6c846ab924d1b67df48a SHA-256: cfe02d8ff9cfa243c846943753be672d2dece8746aee3c91ad43ed738fa397e4
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the high ML score indicate a strong likelihood of malicious intent, likely to distribute phishing content or further malware. The ClamAV detection confirms this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=react+bootstrap+container PDF link annotation
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608658c5d4cdc---rifetonet.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/kimuxoxaxevewut.pdfIn PDF document text
    • http://acril.ru/ufiles/files/84514693366.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/31178ac89f7d6cb1c38597ebae4ac127/55608492163.pdfIn PDF document text
    • http://15449010.com/FileData/ckfinder/files/20210629_23858CCEE5814387.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/26201363856.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/e62b9e1b234861b0a2fbc0725f0f4699/vatul.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/91719781829.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1166213e8b---jenepotu.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9a593b481---79352684742.pdfIn PDF document text
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/pulodapifogive.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85ec275dfa---lugomupenegusuval.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/rujiwukefapavavebuj.pdfIn PDF document text
    • https://thietkeweblongan.com/upload/files/sanilavibabolew.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16076fe34972f7---90335939528.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/064ae84cfb47740ba9a5d0c618302a65/66997652511.pdfIn PDF document text
    • http://longearedhounds.com/clients/65743/File/nefokevasofi.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/19959411619.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cdb777a61b0---87891468526.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/zuwimukiwixipifuw.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89b070e7c5---siwuruseruj.pdfIn PDF document text
    • http://rhodeislandalpha.com/clients/56223/File/gojabod.pdfIn PDF document text
    • https://lemanssrl.it/file/96145095345.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDB 10508 bytes
SHA-256: c7a684a3f72a34c87450f13d709cefb5b4773b0b6c8277fe11a31d2040710b6a
font_02_sfnt_off0000e7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AA 15636 bytes
SHA-256: 166c565cb1756860e92315450e1dae3ee6bfa7170b10167c3ec9d6f9a1728a00

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