Malicious PDF — malware analysis report

Static analysis result for SHA-256 c496ffaf97fef04a…

MALICIOUS

PDF

59.0 KB Created: 2020-11-09 23:23:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b0c31f8a54b06f434ccc41ef65337e25 SHA-1: 8b254cb5e6c47210baf2b10ba57d933dab470eee SHA-256: c496ffaf97fef04a4eaefcbe9484dc72333c2818026b248f120ae445ba953ae9
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 'https://traffmen.ru/123?keyword=words+that+start+with+hale'. This indicates the document is designed to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the redirector suggest an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://traffmen.ru/123?keyword=words+that+start+with+hale In PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/jixidused.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_5f9b5f71eed06.pdfIn PDF document text
    • https://soxupewo.weebly.com/uploads/1/3/4/3/134392520/rudomajuz-numuwu-sufotadujikiw-bemuvugumewid.pdfIn PDF document text
    • https://pudijubo.weebly.com/uploads/1/3/4/3/134311311/2911049.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/515cfe24321b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374203/normal_5f9fb08d5240d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404750/normal_5f96d1a33206e.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/kasuwevovog/79181934127.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/st_joseph_shrine_lowell_ma_bulletin.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/91335612226.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_off0000ad37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD37 5016 bytes
SHA-256: 95c414c5b4afb6d9436fd799e4c1104939a45503444097f94361bd55a2562794
font_01_sfnt_off0000be54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE54 9860 bytes
SHA-256: 22ad2ae592beb20f5d36a8d33a49e9f9736b5cc1d10696f57c409f57ae40e99d