Malicious PDF — malware analysis report

Static analysis result for SHA-256 efc175361ab494db…

MALICIOUS

PDF

65.5 KB Created: 2020-11-12 21:35:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9af36df329ddf7daf0cd125384d61add SHA-1: 1537fe14e039c3c5a8698711905ea9728381e7f6 SHA-256: efc175361ab494db2eb35279fcf9f5234040088c4c5e7a5446f06fb4acbb8bbe
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link disguised as a free event planning schedule template, which redirects to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The embedded URLs suggest the document is part of a link farm designed to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=event+planning+schedule+template+free
    • https://kejedavozeve.weebly.com/uploads/1/3/1/4/131483662/7007994.pdf
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/1769940.pdf
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/5e616607ed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3b07e75a-826b-4c69-bb25-fc555e865381/33259411978.pdf
    • https://s3.amazonaws.com/sajatesawodiji/59140116469.pdf
    • https://s3.amazonaws.com/bezorito/black_navy_war_2_fondy.pdf
    • https://s3.amazonaws.com/boduxatavepe/13483085152.pdf
    • https://s3.amazonaws.com/nijosinizo/61871598589.pdf
    • https://uploads.strikinglycdn.com/files/95ef63bd-00b4-4b37-8868-40200b2bbb3d/53632531135.pdf
    • https://s3.amazonaws.com/kepevipawit/91864438685.pdf
    • https://uploads.strikinglycdn.com/files/f5c4f95d-234e-4f7b-999c-8433fa1de63f/canon_printer_mg2920_instructions.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5bf.bin
b8b0923fd9882b05e3a8891c851a28a9d765e89b4af225ccc93eeab5d106256c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BF 5588 bytes
font_01_sfnt_off0000d89e.bin
1c10ece4661696162da5e1f0783ef12c59872ab69d45342e5b79aeca7750eb3a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD89E 9628 bytes