Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec2923635cc2e1a2…

MALICIOUS

PDF

91.7 KB Created: 2021-04-01 18:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 838afebe40600c62835ea688fbd3ae04 SHA-1: 2f5fb77e55fbeadd27d8bd71f52f3c7143b6a55a SHA-256: ec2923635cc2e1a2cb980c69e437e5e8d57ffa4c1ba58545c14dc48673197a2f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to distribute malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, with one example being http://kebofim.epizy.com/funosil.pdf. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing 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://kuzutuzo.ru/aws?utm_term=short+deep+meaningful+love+poems+for+him PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371005/normal_6032e025ab027.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413375/normal_603bf75bc0b40.pdfIn PDF document text
    • https://cdn.sqhk.co/surikuzezun/hibejcO/zofosejoworofokej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393508/normal_6034bf7eec9e0.pdfIn PDF document text
    • http://leririv.sportsontheweb.net/talulexibiwufajizufu.pdfIn PDF document text
    • http://vizilirudigub.getenjoyment.net/kaxilu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483867/normal_5ff1b8f9180a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446650/normal_5fd9d970c2225.pdfIn PDF document text
    • https://menafove.weebly.com/uploads/1/3/1/4/131438456/barovokesu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481156/normal_601b007f7aff1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491688/normal_603bfbede4415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_605841b29f758.pdfIn PDF document text
    • https://foziwumiwogesis.weebly.com/uploads/1/3/5/3/135321673/vubifizileme_linukudo_bowedugujabojot.pdfIn PDF document text
    • https://cdn.sqhk.co/buzaxelubot/84gii6V/gunshot_wound_face_icd_10.pdfIn PDF document text
    • https://cdn.sqhk.co/soxosovave/hFZifLc/80517798958.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456712/normal_604329c9d09f7.pdfIn PDF document text
    • http://zokoxakabu.medianewsonline.com/mubizikizaliwedul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kebofim.epizy.com/funosil.pdfIn PDF document text
    • http://wudemexa.myartsonline.com/29892524200.pdfIn PDF document text
    • http://lemibutudigosuv.rf.gd/what_is_advanced_general_dentistry.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12878 5616 bytes
SHA-256: f8d96d13fd91aa838d2a7c23666e85deb285d0141ac093f789d753a3281ffeff
font_01_sfnt_off00013b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B6E 10756 bytes
SHA-256: 35601ce2804d9b97d149f73b81b1b2a357d221ec6325429f80a2e1cf207f6150

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