Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ade95817e4577c…

MALICIOUS

PDF

156.9 KB Created: 2020-12-30 17:07:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a4ef34c1b6d541b241c3f75df602b2a4 SHA-1: 16df62711a942d4397664ed92f16ee443079e2ad SHA-256: 82ade95817e4577c56e7d65da34e60c542d32a99ae064b5aea1f8fce2bb99cf5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'cctraff.ru'. The document body, though heavily obfuscated, contains strings related to 'wkhtmltopdf' and 'Qt', suggesting it might be a generated PDF. The presence of a malicious redirector and the MFA lure heuristic strongly indicate a phishing or credential harvesting attempt. ClamAV also detected this as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://cctraff.ru/strik?utm_term=sniper+games+for+android+phones In PDF document text
    • https://static.s123-cdn-static.com/uploads/4480886/normal_5fe015073af48.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/ridoxugo-nefufirugakusi-pevogomoxi-relomikututezom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415745/normal_5fdb21787786c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_5f88fe9130207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393893/normal_5fad9722e0f2d.pdfIn PDF document text
    • https://kemebawe.weebly.com/uploads/1/3/5/3/135313751/tibawowa.pdfIn PDF document text
    • https://juvirafiwak.weebly.com/uploads/1/3/4/3/134307718/387eb52a6887.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470526/normal_5fe52de28d014.pdfIn PDF document text
    • https://cdn.sqhk.co/nalomuxe/giQlgdm/3750896933.pdfIn PDF document text
    • https://jexujomasok.weebly.com/uploads/1/3/5/3/135343442/dukovutevuxa.pdfIn PDF document text
    • https://cdn.sqhk.co/latusetime/WuifggA/10247334732.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/pevarijidasalop/best_bed_sheet_material_for_night_sweats.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/2167877729.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/second_line_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/11706322716.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22C0D 5524 bytes
SHA-256: 721841fd52babc630f456b217542d432d767cbf808d7e80f661eb8b8b2da823a
font_01_sfnt_off00023eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23EAE 11824 bytes
SHA-256: 45faf5ff8382d04642b5257047a99b928746aeeeb8fc2d9a7692d48dda0469bc

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