Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d11837cf7f22493…

MALICIOUS

PDF

55.8 KB Created: 2021-03-17 18:04:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e0736917a12a7228113c2712fb01425 SHA-1: e4ea8c9a9a08ecbd6fb2ed1024e1dcabe283a286 SHA-256: 4d11837cf7f22493958b60875e04c7257ed8240c9c6b10136a2574130e2c802b
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to Weebly and other free hosting services, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier also indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8219

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/award?keyword=bmdp+statistical+software+manual+pdf
    • https://zusajozaza.weebly.com/uploads/1/3/1/3/131381142/kajalinitu.pdf
    • http://chtotakoeverti.biz/first_alert_carbon_monoxide_alarm_5_beeps_end9mc8m.pdf
    • https://jisawawaxiwibes.weebly.com/uploads/1/3/1/6/131606947/8726950.pdf
    • https://cdn.sqhk.co/jawutuwek/Mheiglg/xezuzagurojakevemolirasej.pdf
    • https://janaravepok.weebly.com/uploads/1/3/4/8/134886337/fegem.pdf
    • https://fikuzafunowu.weebly.com/uploads/1/3/1/8/131857523/zixinigoz.pdf
    • https://cdn.sqhk.co/vemudumuxixu/thfX4p3/musejim.pdf
    • http://fullpisetc.ru/canon_powershot_a1200_battery_problemszz9l3.pdf
    • https://wutomafokusax.weebly.com/uploads/1/3/5/3/135314756/ca4ce4c90.pdf
    • https://sabumamopadav.weebly.com/uploads/1/3/5/9/135957329/149e3d18c9e5f.pdf
    • http://infonewsuk.site/trackimo_2g_manual4pp7d.pdf
    • http://ogranicbio.space/buvinep7tz31.pdf
    • https://ponigeje.weebly.com/uploads/1/3/0/8/130874529/e5f1bbaf9b266.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ddd92a83-be69-4fad-827b-20b48a8903ef/medios_de_comunicacion_mas_utilizados_actualmente.pdf
    • https://d525ee04-2a40-494f-8ba9-fee52f7b18ee.filesusr.com/ugd/8b8e24_bf8df0a9bd4d4093ad6e579754452e33.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8907d9e8-934b-46ba-91b8-d5982dfaf34d/how_to_install_a_parrot_mki9200.pdf
    • https://uploads.strikinglycdn.com/files/a7453c59-1826-40b9-aba1-e65ab7930f45/alone_together_lyrics.pdf
    • https://a2214900-82f6-4ed5-a432-d5ffd14110fa.filesusr.com/ugd/306b6b_87aa59f46fb249808570741986d858a7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/68903126-3c51-4674-aa71-a9254a3133ef/are_resistance_bands_good_for_seniors.pdf
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_de74c7e67f4b4b3a87d5ebd0fd9de1ed.pdf?index=true
    • https://uploads.strikinglycdn.com/files/50a6e858-ce66-4228-8e2e-9a1187992fcd/ginebamajafemo.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c87f.bin
cce46d3faf06f2606f9bf0ede5f42cb57bfcd87654d309874194181c71fc0e3c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC87F 5324 bytes