Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e971ae6f8569436…

MALICIOUS

PDF

86.7 KB Created: 2021-08-19 12:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 5863581bb8c5eeea989425c0fdcecc07 SHA-1: e605c01bb2a42017a9e0446ca3069e75c3695d86 SHA-256: 2e971ae6f8569436aded3ce8543c72a58681705e8e358f033da9f45359149a15
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a86de3f84c8c62611bbc74890aeb4e4e/wasova.pdf In PDF document text
    • http://star-transform-moscow.ru/uimg/files/mazafazofogeru.pdfIn PDF document text
    • http://kristenpell.com/userfiles/files/61287520131.pdfIn PDF document text
    • https://cheesykeju.com/contents//files/23823052417.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161125fc48e6e9---lolusilixejelojogez.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/98847076110.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efe1587c742---jonejivitexewam.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/aat126ca3fhho0hjtg0lis5vlb/wijudobobomulerajozogi.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/87989763d08549a0096d2d60c56bb96e/33095881677.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/51489a949b9b499f73a083a3ebb7978b/10131124897.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a44b1a4c6fa---37333656359.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/5089582703.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160df05669025e---96065111060.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/86931739903.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/334051291.pdfIn PDF document text
    • https://akemi.ro/hirek/file/kuxiwotodarizode.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/xuxilajokumakolar.pdfIn PDF document text
    • https://cecprint.com/images/file/gakawufexiwimu.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/julireni.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3a22e7128---depusijeluzur.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/nc7qn8cdmf6c8qesrol7o6o7lo/47404267554.pdfIn PDF document text
    • http://escaletravel.com/userfiles/files/nadevibivitel.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/pisudegafuxoputuxuvebubup.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/d4e09f53c7fb249cfd933a1cbe0bcc26/56754555315.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/cf7bcf87cb95a7cc645b2e4ec6606a76/nudijujuku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=lavatrice+bosch+classixx+5+manuale+istruzioniPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46F 11052 bytes
SHA-256: 8bf95b94d72eab19451b82918ca58b336d61446ac36e281389aa8fa4a7673706
font_01_sfnt_off0000fe19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE19 18212 bytes
SHA-256: 22e57eaf39456cd8e7eab3228bdedfebb7fcee4687e41f563427b5fe1e85531e
font_02_sfnt_off00012c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14436 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc

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