Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3240206a15b59cd…

MALICIOUS

PDF

71.1 KB Created: 2021-02-24 05:15:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: d9274cd14353b444e909313e59ac2072 SHA-1: c569894895b4d17f1a8cfa455b50bbec96169dfc SHA-256: b3240206a15b59cd74fcdd522db89c585e3a66cea967361b08be4557234583ef
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed for SEO manipulation or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as 'https://seumenha.ru/wix?keyword=win+7+loader+2.2.2', are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=win+7+loader+2.2.2 PDF link annotation
    • https://dikozawurizid.weebly.com/uploads/1/3/1/6/131637316/d6ac144e22bf23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445337/normal_5fe8e8ef5bc60.pdfIn PDF document text
    • https://cdn.sqhk.co/golizojuw/l1ihjh7/best_star_map_app_for_iphone_free.pdfIn PDF document text
    • https://zowotojezef.weebly.com/uploads/1/3/4/3/134330732/litijak.pdfIn PDF document text
    • https://gavuwili.weebly.com/uploads/1/3/1/0/131070236/1379215.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/caDicqX/furreal_friends_starlily_my_magical_unicorn_pet.pdfIn PDF document text
    • https://kerijifulonuf.weebly.com/uploads/1/3/5/3/135328136/ravapevera.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/jjjhQYO/moje_moj_short_video_status_for_your_organization.pdfIn PDF document text
    • https://zoluwapipapak.weebly.com/uploads/1/3/5/3/135321816/nurowad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466379/normal_600cf370eb3f3.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/ghjeijb/neon_jumper_mens.pdfIn PDF document text
    • https://lepepapiminokuj.weebly.com/uploads/1/3/4/4/134493398/3758256.pdfIn PDF document text
    • https://nasejanebuxilas.weebly.com/uploads/1/3/1/8/131856105/lobel.pdfIn PDF document text
    • https://cdn.sqhk.co/karapenakozi/ge0bifp/89608063453.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/agg9lc9/bombshell_salon_corning_ny.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404515/normal_60009b8b41c5b.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/jijari/gozidomukovirazudewoz.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/66501507681.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA39 4896 bytes
SHA-256: bf619b5319b613aee6678d377747f704a84196ad5d845e14535867f58643ba3d
font_01_sfnt_off0000eb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB04 10592 bytes
SHA-256: 19542d33caa1f6e12f0fe94d0e789c88b29e0bf999669690cae19130e338f91d

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