Malicious PDF — malware analysis report

Static analysis result for SHA-256 008bb6fb35988eca…

MALICIOUS

PDF

79.9 KB Created: 2021-02-14 17:57:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 555805d6b1044413702227b0e8ffe758 SHA-1: f776d550e7a58a373d7b31b99c8ca7203c754e12 SHA-256: 008bb6fb35988eca383f4b37f13d0285e8598b99eaecf0d2cfa27e88a74ee5aa
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to other PDF files hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://leonvi.ru/wix?keyword=psn+code+generator+2019+apk PDF link annotation
    • https://kofiserifopame.weebly.com/uploads/1/3/2/7/132741397/samojitinikizuv-lulil-lodubupor.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/classifying_triangles_by_sides_worksheetg4ov6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403819/normal_5fe8f1c2d81e3.pdfIn PDF document text
    • https://cdn.sqhk.co/tofatuxurejo/rFhehgh/alien_invasion_adventure_3d_pics.pdfIn PDF document text
    • http://cybety.xyz/schema_electrique_logiciel_macxonpn.pdfIn PDF document text
    • https://fulimutalez.weebly.com/uploads/1/3/4/5/134599943/2440295.pdfIn PDF document text
    • https://topuzuxet.weebly.com/uploads/1/3/0/7/130739133/f5a7fcd36.pdfIn PDF document text
    • https://cdn.sqhk.co/mogidamiko/9gciagi/nuboxaguxefomedimojogop.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/brownie_household_elf_badge_requirementsezhkx.pdfIn PDF document text
    • http://mini-cam2.club/453864948985l15h.pdfIn PDF document text
    • http://tuimag.ru/nursery_rhymes_lyricso6uzj.pdfIn PDF document text
    • https://raxuzorozejataw.weebly.com/uploads/1/3/4/0/134042373/wogalilejikukufef.pdfIn PDF document text
    • https://fiziwiminika.weebly.com/uploads/1/3/4/6/134686918/2703568.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/ihchejf/synchrony_bank_amazon_customer_service.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/wasukozijopdngd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381318/normal_5fd7c612147c1.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawitaxug/5ifaZwv/cheap_wide_width_cowboy_boots_for_womens.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED47 5496 bytes
SHA-256: 142d022c074834da6844e2403ed539a9a2b4ecad1d08d1677050f22d2c00eba8
font_01_sfnt_off0000fff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF3 10812 bytes
SHA-256: 100971e6492843594acd77d20d9f426c1757c425fe1e1f9ffd37dec6d95d0755
font_02_sfnt_off000124d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D4 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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