Malicious PDF — malware analysis report

Static analysis result for SHA-256 721fa6ec0e0e4103…

MALICIOUS

PDF

75.0 KB Created: 2021-03-10 18:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5da762a39c90ada33a6bd9ee1aa30f6f SHA-1: f1b0243caa142bb841d9c34787c1b9bc7c331b4a SHA-256: 721fa6ec0e0e4103cc6fe030da984210da54d7aad1abdf7cc365d5d179f515b2
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

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 0.8702

Heuristics 4

  • 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
  • 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://fokemale.ru/award?keyword=beginner+piano+sheet+music+with+letters+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4530070/normal_602f81691c170.pdfIn PDF document text
    • http://8gusevshop.space/382863542908whbx.pdfIn PDF document text
    • http://ita-talia.fun/36076518910tpdzf.pdfIn PDF document text
    • http://setokanekema.mygamesonline.org/skill_with_people.pdf_bahasa_indonesia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468812/normal_603dbd5564e5f.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/pha4Wwc/57710984040.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/schdcwW/neon_city_riders_ps4_review.pdfIn PDF document text
    • http://graatorama.fun/dutubuez733.pdfIn PDF document text
    • http://uaportal.site/7887087649ah3up.pdfIn PDF document text
    • http://trujillostacoshop.com/vupaxokerxrp4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446289/normal_5feb66da69aed.pdfIn PDF document text
    • http://ourfutures.space/31017681593mb48g.pdfIn PDF document text
    • http://copyright-security-ig.com/407923946514vnqd.pdfIn PDF document text
    • http://zagejudivavi.sportsontheweb.net/how_old_to_work_at_walgreens_in_florida.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pujumek.myartsonline.com/dexagufakudit.pdfIn PDF document text
    • http://nununad.myartsonline.com/vulisine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368f7335-de47-47aa-a9f6-32ca5d8b5768/jowikowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdd17b63-394c-4483-97e1-19dee358cc12/foloxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fb3af00-ce6c-423e-9ba4-c7fe7c4b6f26/40003046260.pdfIn PDF document text
    • http://pixafur.atwebpages.com/pdf_to_autocad_dwg_converter_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4709cb3-2d86-4a68-baa0-991f81c43ed6/autel_maxiscan_ms300_review.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8B 5712 bytes
SHA-256: f3fd81d84aa318664bda788d089d4671206e4a5801ae20a830abcd3d46e09686