Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc8ab24ff4fa9b47…

MALICIOUS

PDF

82.3 KB Created: 2021-04-19 03:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e5f1b51dbfdc708701211c1baf7193d1 SHA-1: 99eb644ac1ba912a52aa981b663cf1559d4eaa88 SHA-256: dc8ab24ff4fa9b47a45fa312910a76baf6143cc38dea9d1c3e40258b213c96d4
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. The document body, though heavily obfuscated, contains references to 'Automotive electrical wiring diagram software' and metadata indicating it was generated by wkhtmltopdf, suggesting a lure. The embedded URL points to a suspicious domain, likely serving as the initial redirection point for a phishing attack.

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://resalured.ru/strik?utm_term=automotive+electrical+wiring+diagram+software PDF link annotation
    • https://menekagamop.weebly.com/uploads/1/3/4/0/134097565/kejizagutadag.pdfIn PDF document text
    • https://cdn.sqhk.co/bujavenizake/jkaOxnc/57428850010.pdfIn PDF document text
    • https://cdn.sqhk.co/dojarodawiw/ihgnhau/90857293027.pdfIn PDF document text
    • http://fumumowovufa.mywebcommunity.org/1640941053.pdfIn PDF document text
    • https://zewurutivuzaned.weebly.com/uploads/1/3/4/8/134888434/5dd6d7592c9.pdfIn PDF document text
    • http://bipiraxas.iblogger.org/26096613590.pdfIn PDF document text
    • https://cdn.sqhk.co/guranotup/jdge7qG/sword_creator_online_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_b7dcc0b6ff7d43d1841da3b31237436f.pdf?index=trueIn PDF document text
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_7197b9eebd874eafb2b36cc892ac2c1d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8c80046-ddf8-4278-9b80-439f48ff3857/xokomube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f626da9c-d581-4096-a4c6-bc9b97b74a88/chet_atkins_freight_train_lesson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f808b3c-fffe-4285-96d1-394afb3c0289/tapijigupixopuj.pdfIn PDF document text
    • http://xipobibupo.epizy.com/51221476493.pdfIn PDF document text
    • http://diratat.rf.gd/graphics_design_course.pdfIn PDF document text
    • http://baxewape.myartsonline.com/bbc_english_literary_companion_for_class_12.pdfIn PDF document text
    • https://cfff6b0e-fc0f-4d9c-a983-c0e60c8b2bfd.filesusr.com/ugd/c637e3_88b46b2e05924661b9c6e53898e9f74d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fe1df65-6ed3-4775-ab70-b581cf36c4ae/the_ugliest_thing_ive_ever_seen_is_a_human_being_without_compassion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57197e29-f2e0-47c0-901b-e76ec57ccae9/is_ninja_blender_machine_washable.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_off00010351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10351 5480 bytes
SHA-256: 5836256d94e37e8029e060b323f06c7b06d0f4f58f3aa94de316c8952d979f2d
font_01_sfnt_off000115ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EF 11276 bytes
SHA-256: 2bb4b7f9de41441ba1a5546b7af74adeef982d50ad43b48cad690c813648dcab

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