Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1636b097dcc548…

MALICIOUS

PDF

75.8 KB Created: 2021-02-18 08:13:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: dba312bd191858db94e5e26c6e8dfba0 SHA-1: 0f9b9eb2fdc791bab9881ff2f20b3e9b90f3fa9e SHA-256: aa1636b097dcc548c458006aaab32003bc679ce6b3b8859361c74bc99b7459aa
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting or link farms, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest it's designed to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://jacksth.ru/123?utm_term=how+to+open+cook%2527s+essentials+pressure+cooker PDF link annotation
    • https://magenudelekoj.weebly.com/uploads/1/3/5/9/135975171/mevogilavumezanikodu.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxefoxo/4tchhMu/99376751992.pdfIn PDF document text
    • https://xofofafe.weebly.com/uploads/1/3/1/4/131438501/puxob.pdfIn PDF document text
    • http://businessoutsourcing.org/aladdin_2019_legendado_mega9z6hc.pdfIn PDF document text
    • http://rigizaba.iblogger.org/army_gd_admit_card_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/fovomesit/igmB0DK/norosinolavide.pdfIn PDF document text
    • http://pubgmobiie.com/manjaro_linux_installation_guidelqsdn.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/Rjehejb/59577788029.pdfIn PDF document text
    • https://cdn.sqhk.co/vufebevefo/A1SijOH/54781682368.pdfIn PDF document text
    • http://igrarazuma.info/712200195845a5qp.pdfIn PDF document text
    • https://febotobelem.weebly.com/uploads/1/3/0/7/130739539/jogipobaz-tujogemuza.pdfIn PDF document text
    • https://raguwagoneneza.weebly.com/uploads/1/3/1/3/131384547/6252d2624db.pdfIn PDF document text
    • https://cdn.sqhk.co/xipapotug/hm8Jsji/nba_games_today_on_directv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wumepudefix.rf.gd/kuvabalil.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/noxetiwumabut.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9E 4960 bytes
SHA-256: 76b14e0c29db09dcf82e11491e3f50c592486345f8b5e31493d4c16bb182d4c4
font_01_sfnt_off0000ef9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9F 10704 bytes
SHA-256: 40c725f02567af38e372f5b7c7907f0d70769d481dcde9284aef7eb92d8c44df
font_02_sfnt_off00011433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11433 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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