Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6e834b6f351420…

MALICIOUS

PDF

68.9 KB Created: 2021-01-09 18:51:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d3fa2e4fa0add7c92b631c9ddd7b8e9a SHA-1: 6733b54e1c159e62e598e620c4d08c97fb3a14f6 SHA-256: 0d6e834b6f3514207f5bd169317626c0a8ec6afa6606bf41a67fcb702e36e558
214 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, including a known malicious redirector. The heuristic firings indicate it's a malicious redirector and part of a link farm, suggesting an attempt to drive traffic to malicious infrastructure. The ML classifier and ClamAV detection further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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.
  • 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://gettraff.ru/aws?utm_term=tamil+hd+movies++english In PDF document text
    • https://static.s123-cdn-static.com/uploads/4405638/normal_5fdd64b482026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380523/normal_5fd171a6406fe.pdfIn PDF document text
    • https://cdn.sqhk.co/zodenizekija/Yyehfhb/litemoripi.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/hfAHij2/legion_builder_orc.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/eGjjSgg/art_therapy_courses_melbourne_rmit.pdfIn PDF document text
    • https://lesesagipamagaz.weebly.com/uploads/1/3/0/7/130739561/wisufe-wewunawezebuda-zasimezogim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419441/normal_5f9893a501682.pdfIn PDF document text
    • https://fukopimuwevi.weebly.com/uploads/1/3/5/3/135351499/9bffc1.pdfIn PDF document text
    • https://likizosuzi.weebly.com/uploads/1/3/4/8/134886942/jurexiduxupegif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404520/normal_5feeb74faf461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447880/normal_5fe8582a55b33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450438/normal_5fb5a00b46622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372681/normal_5f89b8f9ca699.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD297 5152 bytes
SHA-256: 7b5cbeb0755951f9c06e60ab5fcefbfa0f02ead5ed1c2973a091dbe4833c50c4
font_01_sfnt_off0000e3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FE 10216 bytes
SHA-256: d81de2d468d52a3c3759ccacace1302c3b3940012600bd9f9003d77b510fa912

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