Malicious PDF — malware analysis report

Static analysis result for SHA-256 0825f1e6d02bf210…

MALICIOUS

PDF

235.9 KB Created: 2021-01-12 12:34:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: d6735588936a6088aaddf23806b9c5d9 SHA-1: 30c5f9098eea3ebb3abdf17d0a423e4c12add660 SHA-256: 0825f1e6d02bf2104183c665189c85e7502508b6a176107054adc0ca10884a9b
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, traffmen.ru, which is disguised with a seemingly innocuous query parameter related to a game guide. This indicates a phishing or redirection attempt. The ML classifier and ClamAV detection further support the malicious nature of the file. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/aws?utm_term=digimon+world+dawn+digivolution+guide In PDF document text
    • https://site-1199805.mozfiles.com/files/1199805/going_to_the_chapel_sheet_music.pdfIn PDF document text
    • https://site-1168250.mozfiles.com/files/1168250/international_tourism_business_management_jobs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499673/normal_5ffb837d8dd3f.pdfIn PDF document text
    • https://site-1175049.mozfiles.com/files/1175049/66433697965.pdfIn PDF document text
    • https://site-1231171.mozfiles.com/files/1231171/apple_a13_bionic_performance.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375086/normal_5fb03959c1b65.pdfIn PDF document text
    • https://site-1179337.mozfiles.com/files/1179337/80635697963.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495385/normal_5ffd4ea498ca1.pdfIn PDF document text
    • https://site-1176323.mozfiles.com/files/1176323/61100434650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381988/normal_5f9d6e5025079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383805/normal_5f8e4690b7fd6.pdfIn PDF document text
    • https://donodofi.weebly.com/uploads/1/3/1/8/131856097/wokasezuwadije.pdfIn PDF document text
    • https://ruzopujiwinor.weebly.com/uploads/1/3/1/4/131452977/9964365.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/paxoxapazubesagowopotu.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/pafivewufezamemoferegiz.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_off000359bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x359BB 3784 bytes
SHA-256: 78b7c670743bd62e0497508334674aa0c6c38d0c70597c8e775d6fa979e19c31
font_01_sfnt_off00036729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36729 5120 bytes
SHA-256: 4d748388b617c34fb144aeba206b06222d7bb28e8a26548eea17b5ccb1056561
font_02_sfnt_off00037892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37892 11660 bytes
SHA-256: e3dd6355cd4a056673186ca321255b687be16a9679d323399720ce439e6d9942

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