Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d796f2b870cdb2…

MALICIOUS

PDF

76.6 KB Created: 2021-03-17 01:03:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aa1601b8242a9cbccbd4cfbff4433ad9 SHA-1: 368e2bbb2035ddd7186565de2f5a7afa4e862f6b SHA-256: 16d796f2b870cdb2f33dc52f4271df4cf5e59089f04adb418522bd0efa1d5510
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/wix?keyword=codex+angels+of+death+pdf PDF link annotation
    • http://frasqen.online/77130972965bcepo.pdfIn PDF document text
    • https://cdn.sqhk.co/pijavagoke/eIIq7o4/pasig.pdfIn PDF document text
    • https://cdn.sqhk.co/nodujugebi/jcjcAji/95801928409.pdfIn PDF document text
    • http://erethiztzj.space/15734233791c6l6a.pdfIn PDF document text
    • https://diwodineguxep.weebly.com/uploads/1/3/4/3/134305573/kejutedo.pdfIn PDF document text
    • http://itawomen.fun/wovokazugupememikiniaogjf.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/3idVrjh/85278511667.pdfIn PDF document text
    • https://febamepu.weebly.com/uploads/1/3/1/0/131070604/lofebomesevufodidep.pdfIn PDF document text
    • http://thedouche.xyz/does_stock_exchange_work_on_saturdayjfyrk.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/ihdhhvh/57323456466.pdfIn PDF document text
    • http://bristol-yalta.run/mississippi_burning_questions_and_answersy915m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_dfa072cc30e1418d88b8c02695c8d697.pdf?index=trueIn PDF document text
    • https://c07b3cb0-7d4a-4e65-9c62-eb3bd0ce3b6b.filesusr.com/ugd/7560d5_382eb97b1c3245838e7bcfc92e8d5a21.pdf?index=trueIn PDF document text
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_d1dc0b4edc824ab180ccc36619755324.pdf?index=trueIn PDF document text
    • https://99516632-72ce-40f3-a9a1-a01c91361c65.filesusr.com/ugd/e42c35_6a9eed130f8e44b9a0b11743e29fb54e.pdf?index=trueIn PDF document text
    • https://932aa67c-856a-4fda-9fc8-fe3f50d4acc2.filesusr.com/ugd/a25eee_7d2b9593917942c9b8531b49db39b45b.pdf?index=trueIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_a5a62d6a68a44b71b89944c15c5279c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b058cdf8-5416-4878-b86a-acd71947f40e/surah_yasin_full_beautiful_mp3_free_download.pdfIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_f8dc421e80f242ef9b3631668ccfb836.pdf?index=trueIn PDF document text
    • https://e24ff460-1725-4b9d-a7de-f8438c38fea0.filesusr.com/ugd/366850_3bb7af67a98743f49b20541f3b919c20.pdf?index=trueIn PDF document text
    • https://878ee1be-828d-48b9-a24a-84283cf66a1c.filesusr.com/ugd/86936c_f381c40d9e524bf087923efd83d53abc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/92bae819-3082-422d-9c95-28a03419e21c/tesema.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC64 5180 bytes
SHA-256: ef7e1651467972c2db9fff937f5c3891b043a577bdc5627d8c1ca8b79f3661dc
font_01_sfnt_off0000fe11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE11 11036 bytes
SHA-256: a6ad91b66a5b7b9c830afd30a817addb6c32795e95ff5e38451a3a8b1b1ac272