Malicious PDF — malware analysis report

Static analysis result for SHA-256 71959fdfdc5a8453…

MALICIOUS

PDF

79.9 KB Created: 2021-01-16 06:53:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ad9b3b86b5ce87dee735460f7888fb7f SHA-1: be35525a48c69f814131c0de5a27ef9254f37ee5 SHA-256: 71959fdfdc5a845320a3b49bd8ec1839f33483196d893fc991565a0c96cc0142
154 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that point to known malicious redirector infrastructure, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of malicious links within a PDF document is a common tactic for delivering further malicious content or leading users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/123?utm_term=material+flow+analysis+ppt In PDF document text
    • https://cdn.sqhk.co/suxumeva/hhdihii/97563250037.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/KNa7lgc/black_desert_mobile_hashashin_release_date.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413973/normal_5ffb752783826.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375704/normal_5fa4fb5fed22f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454824/normal_5feba745ee3ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f98091dddc5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366005/normal_5ff2d8bd98e70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421776/normal_5fc41b3cf3b51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448129/normal_5fc5a3fc7f320.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/cKjgggY/putivosixa.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxodokoju/je5otja/nuvogepepojiv.pdfIn PDF document text
    • https://cdn.sqhk.co/xolafunodo/5jheUEi/fallout_shelters_near_me_map.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381291/normal_5fdc7c22a296c.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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://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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EC 1528 bytes
SHA-256: 906312b206573a369fdf05f2d58baf7f592464f3d990fc278d772a9a6a9aa3be
font_01_sfnt_off0000ecb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB2 4884 bytes
SHA-256: 73970c8ef8b1a551521eaa81d328cda76915eeb8eaa0801b66e0ab57733f6991
font_02_sfnt_off0000fd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6F 10948 bytes
SHA-256: b996f650af452c4481d3e7a55285a477c94fd176dca5066245638ff767bcbf59
font_03_sfnt_off000122be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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