Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f36d59825b90bc…

MALICIOUS

PDF

100.3 KB Created: 2021-03-30 19:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c8a33473cc2e98911d06596044779e0e SHA-1: 693c219097a22cb3b32afdc30f1ef7a4a4d71294 SHA-256: 46f36d59825b90bcfe648e7cd7ad3c00051a3d96567ecf206d160dc7110b6a38
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with the primary one leading to a domain associated with phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a network of links, likely to obscure the malicious intent or distribute payloads. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/award?keyword=google+advanced+search+operators+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387922/normal_6052771a19e42.pdfIn PDF document text
    • https://leruvipox.weebly.com/uploads/1/3/5/3/135347136/rupujewozu.pdfIn PDF document text
    • https://rokolumer.weebly.com/uploads/1/3/0/9/130969153/sonaw.pdfIn PDF document text
    • https://mobinefoju.weebly.com/uploads/1/3/1/3/131398425/jefilu.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/banking_awareness_questions_and_answers_for_ibps.pdfIn PDF document text
    • https://dubonizu.weebly.com/uploads/1/3/1/6/131606556/nuvefadumisu-dunatagid.pdfIn PDF document text
    • http://tadosuzewamu.medianewsonline.com/75335651480.pdfIn PDF document text
    • http://forecast.bet/xiaomi_amazfit_watch_facessvoqx.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/22443926185.pdfIn PDF document text
    • https://bedexupef.weebly.com/uploads/1/3/0/7/130775630/lijigot.pdfIn PDF document text
    • http://francobusiness.com/affordable_housing_in_ghanawhqdc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419654/normal_5ff96d6663e0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456399/normal_6046687d5add9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451019/normal_6009d29814861.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390638/normal_6004d152ee049.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuwosil/body_systems_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9399f9c5-60fe-4ac5-965a-dbeddfe06673/13932916438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed24a3de-fc56-48a6-9f10-560ea75f2fbb/what_is_the_importance_of_philippine_national_anthem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2028acd-35c5-4bb1-aef7-d677b4a2ee0d/miluta.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/5578535199.pdfIn PDF document text
    • http://mugomodag.atwebpages.com/libros_para_aprender_ingles_leyendo.pdfIn PDF document text
    • http://fuvamawijivef.atwebpages.com/31255718529.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://scripts.sil.org/OFLIn 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_off000126e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E1 5508 bytes
SHA-256: 4a716593dd4a36948956cf936c183106567f28649879b204fb2bafe4594f6cc3
font_01_sfnt_off0001399a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1399A 2052 bytes
SHA-256: bfc0904f0f0d07b2dad5b874710802535660feb5301dd45df0a8c923e4b19bcb
font_02_sfnt_off00014250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14250 12004 bytes
SHA-256: 3a54db4f2b355fe1d7655f05b6032cac39fbebf5da5d054307f499cc4ad36898
font_03_sfnt_off00016b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B93 16344 bytes
SHA-256: 7f851373fda98c2e325b273ef78b146b798d278201b90b183270a550c19e435b