Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6752074aabd0cf2…

MALICIOUS

PDF

67.6 KB Created: 2021-04-04 18:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 151f22a67015fddddd0c787e3405d9ec SHA-1: 8de3171a3a6d87bb8b128d589e11abf8fd45b3a9 SHA-256: f6752074aabd0cf2922fdda09307a4490ee09f18459636d8d71bbfeb5d03840b
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 0.8462

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://dafemum.ru/aws?utm_term=samsung+tu7000+65+walmart PDF link annotation
    • https://cdn.sqhk.co/zaperarori/b89Mxjf/bemifafopagolokesoj.pdfIn PDF document text
    • http://leadtop.co/3452376693mc6i1.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/cZ7jan6/linkedin_app_download.pdfIn PDF document text
    • http://sexedate69.site/dead_doctors_dont_liexjx8r.pdfIn PDF document text
    • https://wajotirege.weebly.com/uploads/1/3/5/3/135306859/4482762.pdfIn PDF document text
    • https://falibapop.weebly.com/uploads/1/3/3/9/133997194/kekos.pdfIn PDF document text
    • http://itverys.space/49560674255wasvi.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/bibejovixapis/zixagoxog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42329ea-6b59-4abf-92fb-ae9b0ef85bd5/vozodogojeraroto.pdfIn PDF document text
    • https://9fbeb193-358d-48fe-b9d9-45f8b63f6b3c.filesusr.com/ugd/ab67b9_959853bb39954cccbecb2442847ca76e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/574737763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a4d3dff-caa4-46a7-b23b-067c5894875b/how_many_btu_is_my_carrier_furnace.pdfIn PDF document text
    • https://2ac8321c-28d8-41c8-ac7a-99137a6fe030.filesusr.com/ugd/157ee0_11615c91fad74f3ab83b9d689191aa51.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bezorito/43812698199.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54bce2ad-6815-45df-9c5a-2e4654d9c5e3/44216535866.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/how_to_take_evening_primrose_oil_ttc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a23fbbf-3fe8-4eb9-a432-899970671937/68185859698.pdfIn PDF document text
    • https://3a0d5408-2ea1-4258-8d29-5d96341cad2c.filesusr.com/ugd/79cb75_670bc1b82bc84eef917e29ecee038810.pdf?index=trueIn 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_off0000ec00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC00 5700 bytes
SHA-256: 693e35e2919ad27b2339b3c4d19a5e8c157f782c0b12f5685b2fc10829305b97