Malicious PDF — malware analysis report

Static analysis result for SHA-256 7221a858228ecd40…

MALICIOUS

PDF

72.6 KB Created: 2020-12-11 21:47:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a6f9d8ccb9103babfbd72887d1d66a94 SHA-1: 5139a73e3bb2b57b322c3eb677b1b6309cd327ad SHA-256: 7221a858228ecd404c5b724250f5b55b1bef8eb31ac628abcd692c6ae98c2c3f
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The document body, though partially corrupted, contains text related to 'company profile template design psd', which serves as a lure to encourage users to interact with the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/aws?utm_term=company+profile+template+design+psd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418401/normal_5faec8a6c4f86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425784/normal_5fcb96e8e0d5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415334/normal_5f9b18d3388cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5fade59061120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421788/normal_5f9e550ca28a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412380/normal_5fa60b1f14a26.pdfIn PDF document text
    • https://kiwemedorupa.weebly.com/uploads/1/3/4/4/134446537/pulijo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470220/normal_5faf8e7d3e21f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d51729c-713b-46ed-9902-7ad55e33f0ad/if_else_statement_arduino.pdfIn 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_off0000dfb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB8 5368 bytes
SHA-256: 97f78adbd16dccac04413c0b4b729d4ec5464789a12af74b5e8c74273eaa0e65
font_01_sfnt_off0000f1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E7 10400 bytes
SHA-256: 36574d667fcfd4a4b301f4816e99bea6a2b1ef3e3be695b84d37b89b23a00c90

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