Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9be5da20a7aa30…

MALICIOUS

PDF

65.1 KB Created: 2021-03-09 04:10:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: bb8ead1bb51f15fd76780c59b181f896 SHA-1: 89a8d0c47ef52007e372f2d6b1bc0d3a602eb028 SHA-256: 3c9be5da20a7aa302d7f7c4312143d003875f25c9375b91433cadc59486091ac
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a domain associated with phishing lures. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for malicious links, further supporting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a compromised site for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9649

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://zajinet.ru/award?keyword=form+i+9+list+of+acceptable+documents+pdf PDF link annotation
    • https://relowuforobelo.weebly.com/uploads/1/3/4/5/134528439/9974064.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/icyFggj/rexojinojumara.pdfIn PDF document text
    • http://misstourist.info/reneret86is.pdfIn PDF document text
    • https://xitupiwe.weebly.com/uploads/1/3/4/4/134489196/64c6fd82843.pdfIn PDF document text
    • https://gibiboxovozigux.weebly.com/uploads/1/3/4/7/134722082/16bfec9ad532.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/A0ugjii/my_talking_puppy.pdfIn PDF document text
    • https://kipunelikerave.weebly.com/uploads/1/3/0/9/130969086/wajenafa.pdfIn PDF document text
    • http://hopecommunitynaz.com/trimble_s6_robotic_total_station_pricejrsxh.pdfIn PDF document text
    • https://gitutibilaralib.weebly.com/uploads/1/3/1/3/131384503/7923725.pdfIn PDF document text
    • https://wudizabilizone.weebly.com/uploads/1/3/4/7/134745746/wefifizelixad.pdfIn PDF document text
    • http://barashik.space/how_to_reset_whirlpool_fridge_after_replacing_water_filteramdtn.pdfIn PDF document text
    • http://shimano-stradic.ru/how_to_reset_a_locked_motorola_phonevhw82.pdfIn PDF document text
    • http://apple-fruit.space/zubep0u9qp.pdfIn PDF document text
    • http://crawlmqyu.space/dry_reforming_of_methane_activation_energyvsyr7.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/taguxif/how_do_i_verify_my_pals_certification.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/waneradulemo.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/modern_world_history_apex_answers.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_off0000f556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF556 5436 bytes
SHA-256: 25ca07fed16c82639b9f3e919f3ab34efdd69de1c94b10834c50aa9810f286d4