Malicious PDF — malware analysis report

Static analysis result for SHA-256 892273d63820d7a7…

MALICIOUS

PDF

77.9 KB Created: 2020-12-26 00:46:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 24745b53596fe159c94a13b37e71b40d SHA-1: 96cf0d1fe39cbd818051168bfc7f47d38bcdd4e5 SHA-256: 892273d63820d7a7d419731c15e05aff722789e2c5b72f710c63accb2aa8be76
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffking.ru/123?utm_term=uw+madison+summer+music+clinic+2019'. This URL is likely used to lure users to a malicious site. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan.

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=uw+madison+summer+music+clinic+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372681/normal_5fd6b200867d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5fa4b69588f57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420449/normal_5f9ae7fe1006d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f89c12b31440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393189/normal_5fa9e31673860.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457868/normal_5fe1326219b9a.pdfIn PDF document text
    • https://cdn.sqhk.co/lerotakisisa/iigfujg/16939310362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488580/normal_5fb034392e7be.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
    • https://uploads.strikinglycdn.com/files/040f224d-c984-4764-8f60-98fcefb08de8/power_quick_pot_pressure_cooker_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96ce5f60-f206-4ede-bf4c-7fd59eb2e1f8/mysteries_of_westgate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/225b5a1f-4518-4c1a-856e-0ac55bd13441/periscope_for_pc_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/415140c4-beb0-4c7e-b567-99d2ddf5382d/sudig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39171c77-a0ef-4e5c-b936-660c0a4d03f3/knight_rider_light_bar_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/70692654191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ee8ae2-4b65-47c6-92a4-65fb03e16991/94798062325.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/fractions_worksheets_grade_6_ncert.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_off0000e679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE679 5452 bytes
SHA-256: 6883476541dcc2521b1e82db97e6720213bc3d3c3928282d9832560905429387
font_01_sfnt_off0000f8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EA 10512 bytes
SHA-256: 59484f4f7cdcc0d843734c866314f353789ac3266b1630136f50d648e07f5fc3
font_02_sfnt_off00011cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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