Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc1080a489a7fe73…

MALICIOUS

PDF

78.1 KB Created: 2021-05-28 21:30:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 94e11c0808d6625cddf263c99fcb970d SHA-1: 1be0457e8c5d02690b7e9d404cb1f40d2fa2ff05 SHA-256: dc1080a489a7fe73d301fc8c03cddcf6a8bfe52682175fef0a00948c8cdce5d5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' indicate the document's primary purpose is to direct users to external, potentially malicious, sites.

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://baarspo.ru/strik?utm_term=2020+aha+guidelines+update+for+cpr+and+ecc PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4483346/normal_60002d834ec50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389384/normal_601d31d85611c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482880/normal_5fde9f884807a.pdfIn PDF document text
    • https://gikotibosad.weebly.com/uploads/1/3/4/3/134332820/maxivajavab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445125/normal_5ff94295b01c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420906/normal_604640893b0dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416305/normal_5feed00439f61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385010/normal_602ad76d06dba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384482/normal_60242edb8561e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450438/normal_5ff9bff9ca746.pdfIn PDF document text
    • https://foxuveguba.weebly.com/uploads/1/3/5/2/135297813/6bb683f94c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373999/normal_5feb5d8eb0f1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393183/normal_605829bdccc22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444100/normal_6057cf7577d2b.pdfIn PDF document text
    • https://gorasamigizutod.weebly.com/uploads/1/3/4/6/134600185/polebagarivole.pdfIn PDF document text
    • https://fixabewol.weebly.com/uploads/1/3/4/7/134711766/48e76e9.pdfIn PDF document text
    • https://kivupopemuti.weebly.com/uploads/1/3/4/3/134318129/gurabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_606229023d7fa.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_off0000f0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A0 5596 bytes
SHA-256: 04450b01e2c18dbfc7d356d9d4beacb55e019ad6f5bfbf291bfc504577a16f7b
font_01_sfnt_off000103a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A5 11552 bytes
SHA-256: 989bb2ece168aeb201b729e854a86925528ea5543410a360854d019fccb9bfc2

Open this report in the interactive analyzer, or submit your own file for analysis.