Malicious PDF — malware analysis report

Static analysis result for SHA-256 e054dde5f823b38b…

MALICIOUS

PDF

76.9 KB Created: 2021-06-08 04:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8b1c6175865e6aa45b1b335c4501be6a SHA-1: 3f4cb76fd0942d91986d0c1cfbd6542dfda7e6dd SHA-256: e054dde5f823b38ba60d9c4c28d37308cfa133f4e17997e4283942d5f39ab1e1
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files, suggesting a link farm or redirection mechanism for phishing or scam content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://inwebjor.ru/pbw?utm_term=how+to+start+predator+4000+generator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454809/normal_60bd06d5a5930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472182/normal_604a15b450c6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459641/normal_6017616fec80d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406820/normal_603e710fac118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417543/normal_60289eb7a2a1e.pdfIn PDF document text
    • https://bijigixeze.weebly.com/uploads/1/3/0/7/130739450/0fde7557d0ed.pdfIn PDF document text
    • https://xurarasetar.weebly.com/uploads/1/3/4/0/134096945/9223615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404990/normal_6049b3826b27e.pdfIn PDF document text
    • https://wuwinotidewav.weebly.com/uploads/1/3/5/3/135349353/tofadewim.pdfIn PDF document text
    • https://tajusubinem.weebly.com/uploads/1/3/4/8/134886452/vevoroxejagasupepani.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477181/normal_602b9a72bbf65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_60342b1ce81bf.pdfIn PDF document text
    • https://nepubodi.weebly.com/uploads/1/3/4/6/134610278/b9bef0ec508a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501991/normal_60369eb677c0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490515/normal_602c845f74851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383295/normal_60be9320d7390.pdfIn PDF document text
    • https://nasovakuj.weebly.com/uploads/1/3/2/3/132303133/gabubatabe.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_off0000f0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F3 5376 bytes
SHA-256: 5a0b249e6615e07554923103d1b86385fb5596a10b6330b32ff219688892687c
font_01_sfnt_off00010361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10361 10336 bytes
SHA-256: 799518c1c258c9a9b15656ab6479bf5712a6b6da5641b0b4eb122b67e1db5f8b

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