Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b3fea906563e26e…

MALICIOUS

PDF

62.8 KB Created: 2020-12-17 15:16:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a884adc429c1fb9f076bd71aa7208efc SHA-1: ea285087a0bb131db96d45ae6858d4078b6d5571 SHA-256: 6b3fea906563e26ea128bd0b2dac2332cde3ff5bf0702bce96f4fb0d4c747d3c
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'. ML classification and ClamAV also flagged the file as malicious. The embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=whale+oil+lamp+parts In PDF document text
    • https://static.s123-cdn-static.com/uploads/4448976/normal_5fc6f53de8919.pdfIn PDF document text
    • https://zepixufiguw.weebly.com/uploads/1/3/4/1/134108583/1917893.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495696/normal_5fcb1e7869629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388060/normal_5fb73c593cbbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404523/normal_5fcce5fc557c9.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/potofaw/tetuvorajufesovabu.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/howl_s_moving_castle_watch_online_dubbed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa4867cc-21cc-4bd5-8c56-59997848ced4/popadelifoduxutero.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/jubonigawum.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2aa5268612547ed696d4d/t/5fcc061fcded405bb8c49913/1607206432483/pc_equalizer_free_download_windows_7.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcee1d2b1d401545ae536d1/t/5fd16a9cad61ab58317e60a4/1607559838151/dexirikenevajose.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_off0000b9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C8 5072 bytes
SHA-256: bada8ceb62f54ef3692f6f6e57d65b455c320c0aea0bcc07135c6e281b03a82f
font_01_sfnt_off0000cae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE2 10524 bytes
SHA-256: 262e0177399f15cf64e83c0c8aa2b099c34ee70883ba855f4beb1b053c92a269