Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6747f4e2ad3dae…

MALICIOUS

PDF

80.9 KB Created: 2021-06-09 12:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e15dc4a343ce3d2d73bc6761b8f28a7e SHA-1: 05cb82060227f124730d50f6e391724fdcdc39d9 SHA-256: 8e6747f4e2ad3daec40bcd25fac8be2c86e41eb615cf70ec3b19da0aa82c47a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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=how+to+calculate+mj+cm2
    • http://lyshiying.com/d/files/17986421172.pdf
    • http://www.jindatunnel.com/up_files/file/panosimiremededojosater.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/1tq4jss39ohip3mud99sa6s2hg/35076030141.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1b182c5a9---kulesonebonunijovugowaxux.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16090e5c472419---29449613906.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/a9209698908674ea81be3ed2cab30a4c/63911526782.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080195269ebe---gurezewibe.pdf
    • http://kudusde.org/resimler/files/bipopeliso.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092beabb5c27---79095916253.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c577c2b93---saramun.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797cf257407---guxakarelilupazifaresopeb.pdf
    • https://estoniapools.com/contents//files/20068265325.pdf
    • http://allprintusa.com/admin/images/file/vodanefimarikijigemem.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/87f0f75168c813164922bcc957b77baf/fixodoj.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/12932027774.pdf
    • http://cuuhoatudong.com/upload/files/pabonolenokigodud.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/fc1d1b3731b5d28315c3ebc4daeb5465/85866940700.pdf
    • https://careersourceokaloosawalton.com/files/public/fojokitaxogonofigerumuvix.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/e15509b428a35e7d1bb7639f6a902057/xanomaxukoj.pdf
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93133562232.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e90e.bin
c9d1e73e368552e6e3c3d9cf0df9750f0ed9016ad02dcff36b519a08699dd3cb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE90E 4932 bytes
font_01_sfnt_off0000f9d8.bin
89fcb4f7296047c9a6628ada0576a9b464c3120fdc0412fde55df1f8de5f4e3b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D8 12000 bytes
font_02_sfnt_off000121f8.bin
354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x121F8 16036 bytes