Malicious PDF — malware analysis report

Static analysis result for SHA-256 6781b1aa7f4205d5…

MALICIOUS

PDF

74.7 KB Created: 2021-03-31 20:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 612bfbfeef89752287246f3275f9859a SHA-1: 9d6329a07f28b158d0e4d8e8b55d9d656c930436 SHA-256: 6781b1aa7f4205d5103f59969a9d828850997d0da242750fb01117ff73bfb22d
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, many pointing to disposable hosting or redirectors, suggesting an attempt to distribute malicious content or conduct phishing. The document body is heavily obfuscated and unreadable, but the presence of external links and the PDF_SEO_LINK_FARM heuristic indicate a pattern of directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7018

Heuristics 5

  • 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 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.
  • 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://ponafet.ru/award?keyword=bron+y+aur+tab+pdf PDF link annotation
    • https://cdn.sqhk.co/nalomuxe/jaQigBj/70749943430.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/gagurudatirikejawuxxvbw.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/gejgBhg/zumapetilamadu.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/LNHBgdQ/loruruzirimezofovifujepeb.pdfIn PDF document text
    • http://amst-watch-v2.club/land_breeze_worksheetun261.pdfIn PDF document text
    • https://cdn.sqhk.co/namulofilox/cXjbidv/67862076949.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/dwhfihi/download_zombie_outbreak_simulator_mod_apk.pdfIn PDF document text
    • http://lisolu.org/jandy_lrz_pool_heater_troubleshooting_guidelcp12.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/gfHihhe/mix_match_color_bedroom_furniture.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499958/normal_5fffcc3d8cc5e.pdfIn PDF document text
    • http://draiwenstore.online/42401771708n12wi.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/hcs8pUy/fubiwafabusunowuremiv.pdfIn PDF document text
    • https://cdn.sqhk.co/zeritogekuja/hjo2239/zaxanuvonuvupolefanid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457296/normal_6058893e5fae7.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/hea6hbO/affirm_login_denied.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/w2jn2jj/zijijaxaximadakudized.pdfIn PDF document text
    • https://cdn.sqhk.co/sizozizaj/LEihGBo/rukegiwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443819/normal_6025667195001.pdfIn PDF document text
    • https://cdn.sqhk.co/fekerepusa/ghv5HUc/cartoon_wars_gunner_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/QUwhetg/mirubexajosun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://beea745c-e446-4317-9ad8-fe501d584c0a.filesusr.com/ugd/9196db_222a39c275bf44e480f93743b0ad11af.pdf?index=trueIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_e457b72886a342ddbb7aa271a17b0c46.pdf?index=trueIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_4ebc611146a64b0fb9a24ac20ca4a55a.pdf?index=trueIn PDF document text
    • https://66c7139a-03c0-45fe-98d3-e817d1e01442.filesusr.com/ugd/de2db5_94175c1cc01842e3a21a58095cb434dc.pdf?index=trueIn PDF document text
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_3b24a1dc9114456f92307f0797ab1d1f.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f81a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81A 5116 bytes
SHA-256: 2a49d45de82639cb633b409305807f2223f6f179db065831a40426b790ed5138
font_01_sfnt_off00010999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10999 11040 bytes
SHA-256: 28eca29ffd02ee9db62442b7f889fa52fd15c9fa2afadd7685e2955246a101b7