Malicious PDF — malware analysis report

Static analysis result for SHA-256 768a3792de2706f1…

MALICIOUS

PDF

72.8 KB Created: 2021-04-01 03:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dcf288d0e69fafcfae342a200673d518 SHA-1: 53b7723b0da09dbfc10d8ee3c79af4519bf8962e SHA-256: 768a3792de2706f14d90ceffb6ddbe4029580514e0eaaa25b2269c566de02fc8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The embedded URLs suggest a phishing or link-farming scheme designed to redirect users to potentially malicious content. No scripts were extracted, but the presence of many external links indicates an attempt to lead the user away from the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/award?keyword=clustering+technique+in+writing+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366351/normal_601386b8b8bfe.pdfIn PDF document text
    • http://lumasewupuzu.iblogger.org/35874235229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378827/normal_6048ec693aaf5.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://lumolak.rf.gd/15618705125.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/fixupemanemuwisod.pdfIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_2921e04f81f04c7db27d2ab6f3df1b39.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/powerpoint_2010_animation_effects.pdfIn PDF document text
    • http://tereralubo.epizy.com/84355236337.pdfIn PDF document text
    • https://4461694d-a6f7-4a69-895a-ff5ddeb3c622.filesusr.com/ugd/f504fb_96fa18e9bf504da7a54e4265bc477ae5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/how_to_get_adopted_birth_certificate.pdfIn PDF document text
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_55fb4794f89848a5b77b7f4b5eacfb6d.pdf?index=trueIn PDF document text
    • http://mipagolawalixa.onlinewebshop.net/ver_diarios_de_motocicleta_espaol_latino.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/the_pigman_audiobook_chapter_5.pdfIn PDF document text
    • http://vekubuj.rf.gd/duriduvewumelewoxu.pdfIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_eb0c76d3cd8d45e1bb20943f69379ae2.pdf?index=trueIn 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_off0000d14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14F 5220 bytes
SHA-256: d88afa366707075fc03c2f9c552a7a36481d1adabcbca46512bce4cf7ff5b15f
font_01_sfnt_off0000e313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE313 10944 bytes
SHA-256: 4d8fdfcf56c7400cc257b382d2928e4431fbd4c074ac2f614b2fc32eca1624b8
font_02_sfnt_off00010843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10843 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.