Malicious PDF — malware analysis report

Static analysis result for SHA-256 8521a361bdb18bee…

MALICIOUS

PDF

74.2 KB Created: 2020-12-28 22:34:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ca31488e9ae03c80ed77b43e251cb67a SHA-1: e5742fb6ed8af75b8ed6a5825b130f6cde82abd1 SHA-256: 8521a361bdb18bee18b4634a4e626d7cc6806a1f3a9b101e2da6d1121cd1cf3f
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 'ggtraff.ru'. This URL is likely used to lure victims to a malicious site. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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://ggtraff.ru/strik?utm_term=mk11+aftermath+dlc+skins In PDF document text
    • https://static.s123-cdn-static.com/uploads/4501231/normal_5fc7a5e8af304.pdfIn PDF document text
    • https://cdn.sqhk.co/gigemuji/gghUjdY/nesupixuram.pdfIn PDF document text
    • https://velumosatowe.weebly.com/uploads/1/3/4/8/134883763/9823130.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458635/normal_5fbe2dbe58eef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404293/normal_5fd043cf123ca.pdfIn PDF document text
    • https://kulilopoxi.weebly.com/uploads/1/3/4/3/134375859/vafofobozazibepev.pdfIn PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/mgfijxT/jiffy_lube_coupons_pomona_california.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/02f48d97-02da-4714-8f82-044dc638bd48/wabakunujeb.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/agronomy_crops.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/20911461973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b871c781-6b19-4a30-b3a6-099a7b1d2956/server_execution_failed_windows_7.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_off0000dfca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCA 5380 bytes
SHA-256: a77e1ccfd605bd09e59fc113b41142aade343008af7a8fbe125323c9da163076
font_01_sfnt_off0000f204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF204 12856 bytes
SHA-256: c01369a4da4f464735135dd23eb7d949e53c060c9570d46b5e0ac3acbf6a8ab3