Malicious PDF — malware analysis report

Static analysis result for SHA-256 d82d8c4da22b1b7d…

MALICIOUS

PDF

73.7 KB Created: 2021-02-23 21:44:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 73f45fb137f2956270c64627cdfa3e8c SHA-1: 449040bb65bce7f52e39f6394c4d1d9504d53974 SHA-256: d82d8c4da22b1b7d4551e6d23d1e7bde137efd3f2c7d25ba87de7e50793cf807
126 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to cheating a driver's license eye test, likely directing users to a malicious website. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to potentially harmful content.

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://jottigo.ru/wb?keyword=how%20to%20cheat%20driver PDF link annotation
    • https://baxorejo.weebly.com/uploads/1/3/5/2/135295822/jiwapose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461509/normal_600daffef00af.pdfIn PDF document text
    • http://jekiroxawuto.iblogger.org/html_add_link_to_document.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423188/normal_5fc8f0be57f47.pdfIn PDF document text
    • https://vudemigubujesi.weebly.com/uploads/1/3/5/3/135300151/5839805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481275/normal_60131b7c339af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392474/normal_5ff310de3beee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494432/normal_6015393b4b411.pdfIn PDF document text
    • https://diwoneguni.weebly.com/uploads/1/3/1/4/131407083/virubesipepitip.pdfIn PDF document text
    • https://vexepagofebove.weebly.com/uploads/1/3/4/8/134866030/pekuvigeburi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474170/normal_5fe3d87cb24b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465564/normal_601d2fc1827d1.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://buwumimuxumes.rf.gd/fufitiwega.pdfIn PDF document text
    • http://jepameji.rf.gd/boot_camp_2008_movie.pdfIn PDF document text
    • http://puwivovenot.epizy.com/vigudixijupewenatadedabag.pdfIn PDF document text
    • http://fevanazenanow.rf.gd/o_reilly_python_for_data_analysis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD657 5064 bytes
SHA-256: 1cc1679e7cdaeac345588320c6c2cbd2802b05dd096d1b8e728b191ca41ad899
font_01_sfnt_off0000e79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79B 10368 bytes
SHA-256: d169ef61142ccb52080dc399e9134087cb1e145fea826f3e22a78142786607df
font_02_sfnt_off00010b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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