Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be4ab6c5335b4dc…

MALICIOUS

PDF

74.8 KB Created: 2021-05-06 03:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ee667e1909666071b5f863f50fe06e0b SHA-1: d74719917c60d2fc02f8eb13f337fca4bbf2ad63 SHA-256: 7be4ab6c5335b4dce907a553c799803d294150a7c02bbae996c0df90912d0dd7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://gimoguvi.ru/strik?utm_term=have+yourself+a+merry+little+christmas+frank+sinatra+key PDF link annotation
    • https://cdn.sqhk.co/lojosewude/baribWc/xojufame.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/igePNYt/survival_in_the_desert_plane_crash.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/heicK3f/jovokepedovepesuzovu.pdfIn PDF document text
    • http://soxisit.22web.org/microsoft_excel_course_outline.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/how_to_make_simple_homemade_ice_cream.pdfIn PDF document text
    • http://korefubelexusiz.medianewsonline.com/xifimodedawadobi.pdfIn PDF document text
    • https://cdn.sqhk.co/torixugajo/ifjaiio/chicken_margherita_olive_garden_review.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/HnqNjgK/sotipob.pdfIn PDF document text
    • http://scandisvet.ru/10_day_green_smoothie_cleanse_health_benefitsp39jz.pdfIn PDF document text
    • https://cdn.sqhk.co/dodagirojep/cSf5yjj/foguleri.pdfIn PDF document text
    • https://cdn.sqhk.co/wovupeni/6hegdZd/small_white_modern_farmhouse_plans.pdfIn PDF document text
    • http://gusanod.22web.org/6987637937.pdfIn PDF document text
    • http://sberbank.link/25060968726cgbmq.pdfIn PDF document text
    • http://vivodomox.22web.org/automatic_star_delta_starter_circuit_diagram.pdfIn PDF document text
    • http://creditscoretracking.info/koxakibomefuzubukavuban04rai.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/xovevugetedaketojonelarex8oh6p.pdfIn PDF document text
    • https://cdn.sqhk.co/lemijexo/BJjhltU/50080505911.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://furipurisebete.onlinewebshop.net/marketing_textbook_download.pdfIn PDF document text
    • http://nexoluximil.rf.gd/wimalujexibis.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_off0000e50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50D 5308 bytes
SHA-256: 07751ff08b1987c455db8141c867845971c6a8b8b28351c647025ddd04162fdc
font_01_sfnt_off0000f6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FD 11312 bytes
SHA-256: 3e7878392480b86a82e20bc88eeb050e331970b702185aca6d40570369184a2e