Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7199144ccbe3fe6…

MALICIOUS

PDF

196.5 KB Created: 2021-02-17 12:54:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de5a1feca2e76c67a6a8d9a2ef518b3e SHA-1: 978f948c61b1d6c2af6a6ae3adcfc676695ca71c SHA-256: d7199144ccbe3fe6a442588ca3d1f9d69fb620872cc37c79fed3b08b0132e236
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://yafferge.ru/wix?keyword=corrupt+tower+persona+4'. ClamAV also detected it as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The ML classifier strongly flagged this PDF as malicious. The document body is heavily obfuscated, but the presence of malicious links points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/wix?keyword=corrupt+tower+persona+4
    • https://cdn.sqhk.co/rezeribevi/Mgfpicr/28942084387.pdf
    • https://gadebalemalun.weebly.com/uploads/1/3/4/4/134443756/widumiw-wosavovex.pdf
    • https://cdn-cms.f-static.net/uploads/4489733/normal_6027346b569f6.pdf
    • https://static.s123-cdn-static.com/uploads/4461786/normal_5ff4047e0f73b.pdf
    • https://cdn-cms.f-static.net/uploads/4473056/normal_5fd892ca4a72f.pdf
    • https://static.s123-cdn-static.com/uploads/4386361/normal_5fcfe585e5057.pdf
    • http://lasns.fun/69500762291f5vbc.pdf
    • https://cdn.sqhk.co/nufolado/gg50EBj/pibifuzoxinonal.pdf
    • http://tersq.fun/piselazozukefomizaralufiwef8xi.pdf
    • https://static.s123-cdn-static.com/uploads/4382423/normal_5fdd44f817e60.pdf
    • http://pribor-poverka.site/picsart_latest_mod_apk_revdljvlzw.pdf
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/9107402.pdf
    • http://itdiscount.info/moviedroid_apk_for_pc43i00.pdf
    • https://static.s123-cdn-static.com/uploads/4451352/normal_5fc8d987c8a45.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/dumupa/11961010594.pdf
    • https://s3.amazonaws.com/dowesitobuga/96111216007.pdf
    • https://s3.amazonaws.com/satudifin/77990018792.pdf
    • https://s3.amazonaws.com/muxozuvalubi/jibezomukafonabivigesoge.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e014.bin
2876c2572445207b8b03cf262d9062873080b8f0ef8b37d8b20bc6155b510298		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E014 74456 bytes
font_01_sfnt_off0002c01f.bin
19c4fd5f3f26543ec5da661e43a51b9dfb78789526f5a27335f5add2d30c0966		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C01F 4820 bytes
font_02_sfnt_off0002d0a3.bin
aea77d5e2b07ae52f3a56607f790b8abed5efc7279391829503a64ccc56956b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D0A3 11224 bytes
font_03_sfnt_off0002f603.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F603 4324 bytes

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