Malicious PDF — malware analysis report

Static analysis result for SHA-256 34118902ae96e047…

MALICIOUS

PDF

62.5 KB Created: 2021-06-02 23:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b795cc55f72621d87d05d3f956780f01 SHA-1: b7c4eb3abc9e3225488984b110569c7ba604c9aa SHA-256: 34118902ae96e047f275a1280e4e9c3ea294c8d7b6b6c45c52dd32cf1c1a2eba
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF link farm', suggesting a malicious intent to redirect users to potentially harmful sites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the link farm heuristic indicate a phishing or SEO manipulation attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9517

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://infrive.ru/pbw?utm_term=karnofsky+performance+score+0
    • https://turamuko.weebly.com/uploads/1/3/4/4/134458704/botojes.pdf
    • https://static.s123-cdn-static.com/uploads/4424036/normal_5fccb4232d816.pdf
    • https://cdn-cms.f-static.net/uploads/4370263/normal_6060b849b8fb7.pdf
    • https://nekejoravumow.weebly.com/uploads/1/3/4/3/134355852/88af162.pdf
    • https://jazujopu.weebly.com/uploads/1/3/0/8/130873842/419387.pdf
    • https://soravetojovon.weebly.com/uploads/1/3/4/8/134890923/kevera-guwige-borito.pdf
    • https://cdn-cms.f-static.net/uploads/4411686/normal_60462c583f7ea.pdf
    • https://zifusiwi.weebly.com/uploads/1/3/4/6/134686012/rekikujo.pdf
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/kuxotegawobi_sejom.pdf
    • https://povarudoro.weebly.com/uploads/1/3/5/3/135324530/11b88dc06.pdf
    • https://povuwifapijolak.weebly.com/uploads/1/3/4/2/134265363/34b8212c1f.pdf
    • https://nisivijuwowog.weebly.com/uploads/1/3/0/8/130813757/9173835.pdf
    • https://vetaroxavobu.weebly.com/uploads/1/3/4/4/134441067/lafudize.pdf
    • https://kikipaniwuno.weebly.com/uploads/1/3/4/7/134714830/pazowozotames.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ee8b3c1b-31c4-4304-9fd2-f711fedb3b4e/xafotikax.pdf
    • https://uploads.strikinglycdn.com/files/51d01397-b4f6-48fd-bde4-84ab96189367/char_broil_4_burner_bbq_cover.pdf
    • https://uploads.strikinglycdn.com/files/7d5c285a-d12c-4c4d-87f8-abc1fb2341d0/live_action_role-playing_game_participants.pdf
    • https://uploads.strikinglycdn.com/files/722f8984-d7a8-4576-9673-e9515c730e39/47407217754.pdf
    • https://uploads.strikinglycdn.com/files/3bf3990e-b024-4096-a71c-16b7693125cb/modern_quantum_chemistry_szabo_solutions.pdf
    • https://uploads.strikinglycdn.com/files/3e6f4706-82a9-4ab8-8fe4-1c35eb17561c/how_to_clean_a_dishwasher_drain_trap.pdf
    • https://uploads.strikinglycdn.com/files/ebc378d5-0389-4f1d-ba07-9df2cf7ca94c/suvalonawufuzorasodoxoman.pdf
    • https://uploads.strikinglycdn.com/files/70a5d94f-77e3-4ce3-bb7a-313414a7538c/kirodati.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1a0.bin
63e994280463cceb443b7cccf3a37ab1c6b77c9501d91e2474c5546ff4e98fc2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A0 5408 bytes