Malicious PDF — malware analysis report

Static analysis result for SHA-256 602bba754507b4d8…

MALICIOUS

PDF

82.9 KB Created: 2021-01-12 11:48:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c96f09e734b0c9c0aa52c6f2b652abb5 SHA-1: 7e31c206b862cfa8e61dd24fd164035324373b71 SHA-256: 602bba754507b4d838a4e0765dd3de4f9eccad7f2336cdb199cf86cbc7a84bb4
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs pointing to known malicious redirector infrastructure, specifically `https://traffine.ru/aws?utm_term=alumni+association+bylaws+template`. ClamAV detection and ML classification strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to an 'alumni association bylaws template'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=alumni+association+bylaws+template In PDF document text
    • https://static.s123-cdn-static.com/uploads/4422643/normal_5fee86df99b88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482216/normal_5fd7cda39956f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5faf949fe0c0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490367/normal_5fc57960b0aaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368224/normal_5feddfdd1863b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401732/normal_5f97220a878df.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/icggX8D/royal_chaos_gem_guide_renjie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495037/normal_5fab794b9df85.pdfIn PDF document text
    • https://site-1209772.mozfiles.com/files/1209772/twistee_treat_clermont_hours_of_operation.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488323/normal_5fc50da07fd99.pdfIn PDF document text
    • https://site-1168315.mozfiles.com/files/1168315/bifidibo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444885/normal_5ffa51d386626.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403808/normal_5ff11e44e9e71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10814 5304 bytes
SHA-256: c3f013f880936265e3417c2a9daffcef3772faa8493db12ed6e8ef3faceeb240
font_01_sfnt_off00011a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A29 10664 bytes
SHA-256: ab5e90179f5db72c36a0211cd3f1b2996365b21c768a98b7be511908466c2487

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