Malicious PDF — malware analysis report

Static analysis result for SHA-256 951386b71eccce19…

MALICIOUS

PDF

65.4 KB Created: 2020-12-30 11:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7779447d07736987ecef948558b9b8ca SHA-1: 139040b1a3a349dddc18b102ae103df6d66f43d5 SHA-256: 951386b71eccce190e27b21f6f72348c5728b8fbd5d0551f9a6abab069a8f9a1
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 'traffmen.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL suggests an attempt to lure the user to a compromised site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffmen.ru/strik?utm_term=assistant+principal+salary+texas In PDF document text
    • https://cdn.sqhk.co/rilixuzewiv/cvjggjj/hearts_and_minds_childcare_euxton.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373516/normal_5fc100c079720.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418368/normal_5fe1877e74b8b.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumula/ihbXrb6/scary_ringtones_sounds_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_5fac58d347696.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382778/normal_5fccd59945f35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480756/normal_5fc030d14dbd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485010/normal_5fc254e61dde4.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/c25fec2b-90df-4d19-9231-7840a0ba24c3/larry_wheels_program_free.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/bopozubadilujibelola.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_off0000c1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F2 5088 bytes
SHA-256: 8800810a1628c02c69942ddb4f5b99772c356cf81a866729a5275d5a161bb7ad
font_01_sfnt_off0000d358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD358 11000 bytes
SHA-256: b83b4748826391cfb03ce252dbd0a4f8af06d3b95cd2e5bbce19b0505c283305