Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb1e923232f3ff51…

MALICIOUS

PDF

76.9 KB Created: 2021-01-25 21:05:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fa19774f487b71cc6c824ef2cecb76f6 SHA-1: 16921840c1a890886a079a402508a1657e95963f SHA-256: fb1e923232f3ff5101b994e27e8169497fdc8ab6e9ed4b351b7c2718a4ed911a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is also flagged by ClamAV and a machine learning classifier. The document body, though heavily obfuscated, appears to be a lure related to search results, likely intended to trick the user into clicking the malicious link. No scripts were extracted, but the presence of a malicious URL is a strong indicator of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffking.ru/123?utm_term=pictures+of+the+lewis+and+clark+trail In PDF document text
    • https://static.s123-cdn-static.com/uploads/4490534/normal_5fcecb43daf24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383689/normal_5ff2878818673.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489050/normal_5fc680a334361.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_5fd68dfb11cf2.pdfIn PDF document text
    • http://jatamonip.iblogger.org/brevet_des_collges_franais_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494432/normal_5fe9b376ac949.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381788/normal_60094135aaefd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485436/normal_60076f05456e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493873/normal_5fdc7c6005d06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476566/normal_600c9cbb34dd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408703/normal_6006553d03cb8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ditufadupogeju.epizy.com/lepapederopa.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/vofiwaxerukiwakuxigope.pdfIn PDF document text
    • http://nabepazefesuju.epizy.com/winulovokovikiw.pdfIn PDF document text
    • http://tekunobujolid.epizy.com/fukaruvepazuvojonitex.pdfIn PDF document text
    • http://sejekaxupoze.epizy.com/aisino_annual_report.pdfIn PDF document text
    • http://mujijebal.epizy.com/2010_hyundai_accent_review_consumer_reports.pdfIn PDF document text
    • http://lesefapor.epizy.com/powebufuw.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_off0000f0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B3 5268 bytes
SHA-256: 86d771b30b353a68705b17138ede49282db6d80a649fcfb6c7a49eec6045f7e3
font_01_sfnt_off000102ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AC 10812 bytes
SHA-256: 3f591a80a7042340b73ef24488c5c991fd894d88e7fc9eb7b67dfec5a3a85061

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