Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a4f28b7a980dcd2…

MALICIOUS

PDF

71.4 KB Created: 2021-01-14 08:25:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7975923f43196eb9214ecd8243ec43f7 SHA-1: ea3ef95ff9f7ef01b5ed5bc47414ca60269fd382 SHA-256: 0a4f28b7a980dcd203153c411fc4fd560b9652baf13c6e8bca4bd49796fa1eee
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing or trojan distribution attempt. The PDF contains a large number of embedded external links, indicating a link farm or phishing lure. While no scripts were explicitly extracted, the presence of numerous external URLs suggests the document is designed to redirect users to malicious sites, potentially for credential harvesting or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/123?utm_term=dr+rick+rigsby+podcast PDF link annotation
    • https://site-1168300.mozfiles.com/files/1168300/todomusuforegirup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478670/normal_5fcf42acd34e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392441/normal_5fcf69ff902d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482009/normal_5fdc19b3440df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480594/normal_5fff701026f7c.pdfIn PDF document text
    • https://site-1178836.mozfiles.com/files/1178836/26362456184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476443/normal_5fab2556e457f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470962/normal_5fecc6cb4dfa0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449781/normal_5ff9a5130846c.pdfIn PDF document text
    • https://site-1201825.mozfiles.com/files/1201825/schema_electrique_lumiere_et_prise_de_courant_quebec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f88be857cbcf.pdfIn PDF document text
    • https://joxiwawetesamiv.weebly.com/uploads/1/3/4/3/134306419/benarat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f88edad2b914.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_off0000da5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5C 5516 bytes
SHA-256: 299300eb938569e09cef49f96f9505081b3beac28e552788058e153347b660fa
font_01_sfnt_off0000ed39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED39 10440 bytes
SHA-256: d41b6b52c2b8e0728bc0ad727eea87951e21e1bf4d2cbc2d354f2b3a2e9ef756

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