Malicious PDF — malware analysis report

Static analysis result for SHA-256 4187936d83a347d3…

MALICIOUS

PDF

78.5 KB Created: 2021-01-14 06:54:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f4164dd3d3053ae025c118cca3dcbac2 SHA-1: 06e8af31eb634b2e8c63ec4c8141458814b66972 SHA-256: 4187936d83a347d3492984c50e0be094a664551c41b2a3e85aca8ac97567e693
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 'traffking.ru'. ML classification and ClamAV also flagged the file as malicious. While no scripts were extracted, the presence of a malicious URL strongly 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 0.9998

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://traffking.ru/aws?utm_term=dead+soft+stainless+steel+sheet In PDF document text
    • https://site-1171656.mozfiles.com/files/1171656/1057959316.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417827/normal_5ff8b78398428.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420760/normal_5fcb0486d88f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472198/normal_5fb6094cb9963.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jonora/fiwumatebavuje.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/31169143331.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/everfi_module_3_credit_scores_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/7319348560.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/74166549100.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/apa_article_abstract_format.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/commitment_of_traders_report_bitcoin.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/72256509642.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/6050552039.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CF 4688 bytes
SHA-256: 2949a4ea3d8cb6010bf0b6458adcdcca7abd2f631c43f382fd374450b754788c
font_01_sfnt_off0000f8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B2 10892 bytes
SHA-256: 4803c227ad9330960b0e2577ab3dcc0cf9d66f72fd14d443e7de52ed9bf8c8a5
font_02_sfnt_off00011db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB1 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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