Malicious PDF — malware analysis report

Static analysis result for SHA-256 a64f8d029a95145a…

MALICIOUS

PDF

80.1 KB Created: 2021-03-13 14:14:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 29afa0023640e31d941ea5cda88da3b9 SHA-1: d6fb01ea32a38defa00fa5d4601f9a8afdfd3ae8 SHA-256: a64f8d029a95145aef556444bdfed133fb682e9b68fdee93fd0acb95c4ef7efb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and one directly linked to a URL that appears to be a phishing lure. The document body, though heavily obfuscated, suggests a pretext of providing definitions and examples, likely to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=functional+analysis+definition+and+examples PDF link annotation
    • https://cdn.sqhk.co/woxemumi/he5ijxP/vogixoba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402267/normal_600691bcbf1f9.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikalamo/btXjca3/vofugakudu.pdfIn PDF document text
    • http://wavakuxakuxom.66ghz.com/scary_phone_call_yahoo_answers.pdfIn PDF document text
    • http://gufurebu.medianewsonline.com/does_the_constitution_explain_the_electoral_college_system.pdfIn PDF document text
    • http://jonebukusopovet.mygamesonline.org/foodborne_pathogens_and_disease.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408875/normal_5fdaba6fd1465.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/13438449241.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/pre_drilled_melamine_shelving_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/64826801692.pdfIn PDF document text
    • https://cdn.sqhk.co/tiviluluje/ieFQcif/gacha_life_pictures_alpha_girl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501632/normal_601f57bb210f5.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/how_much_is_it_to_get_an_exhaust_welded.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_dd4a2c1ee22744e0a30a2c996757e5aa.pdf?index=trueIn PDF document text
    • https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_b41e65d8e8e84e418cf4e0d535f6e63a.pdf?index=trueIn PDF document text
    • http://tekunobujolid.epizy.com/9204070295.pdfIn PDF document text
    • http://siwofumev.rf.gd/82539020524.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA8 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off0000f9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EB 5332 bytes
SHA-256: e7edbe8f11243ff255574003e8a31df1f0da0b895d0e00a4ed327671628bb467
font_02_sfnt_off00010c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C12 11164 bytes
SHA-256: 4ae8ca4bf963db4450ea483bb8c01b6dc22b6dda2eaeb7465eb3a5b91419cfcb

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