Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16d79ee61760934…

MALICIOUS

PDF

88.5 KB Created: 2021-02-12 06:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 2de08310fc79e3958748c893e11e327e SHA-1: af34caa4fcdcc13611929a152f62663273a911b6 SHA-256: a16d79ee617609343ba07a8ffc65f51cba718d2babeb94d3a032c48d0ab4ce38
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically pointing to 'seumenha.ru' and disguised with the text 'Power prayers: warfare that works'. This heuristic, combined with the ML classifier and ClamAV detection, strongly indicates a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://seumenha.ru/123?utm_term=power+prayers%253A+warfare+that+works PDF link annotation
    • https://libizegenumejav.weebly.com/uploads/1/3/0/7/130775388/4698812.pdfIn PDF document text
    • https://jizojalagakamu.weebly.com/uploads/1/3/4/8/134886497/1265618.pdfIn PDF document text
    • http://firstreadersclub.com/vscode_portable_versionk8mwt.pdfIn PDF document text
    • http://wadopipojadali.iblogger.org/wunovotenem.pdfIn PDF document text
    • https://cdn.sqhk.co/sisuriwul/ier0iiJ/stickman_army_team_battle_gogy.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/NifieHw/vampire_the_masquerade_night_road_sbenny.pdfIn PDF document text
    • http://creditpm.com/online_quran_teaching_jobs_from_homecd7yz.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
    • https://s3.amazonaws.com/buganabowumujef/tudatamusakoxusavowegumip.pdfIn PDF document text
    • http://rinafuladimuk.epizy.com/remarks_in_progress_report_card.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/datorukadanokaxodeli.pdfIn PDF document text
    • http://dadagax.epizy.com/aplikasi_icsee_pro_for_pc.pdfIn PDF document text
    • http://nilipinuz.rf.gd/92432055401.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/zuloxudaju.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_off00011119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11119 4900 bytes
SHA-256: a7674d9a2d17434c703ec5bb0d8eebd89b4ef6b50711286c41d449ba30fe994a
font_01_sfnt_off000121e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E9 10796 bytes
SHA-256: 06be389a2c5337444acf8d2380d9a2275ff24608b2757e6dc9a7b7661397bdfe
font_02_sfnt_off000146d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146D3 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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