Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a3e731c5c917d05…

MALICIOUS

PDF

34.7 KB Created: 2020-04-25 17:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b66f26d1e0e8487a3947a8e2800c185a SHA-1: 2683d37d5f113d0bbd34a409e62c32942e8c380c SHA-256: 1a3e731c5c917d0502f6d9cc159ede4ec282043148d7b50d7624b5461d8ad9d6
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, many of which point to other PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. The document body, though partially corrupted, indicates a lure related to a 'Canon 5dsr manual italiano'. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users to potentially malicious content through a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 3

  • 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
  • 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 http://maurice-taylor.com/uploads/1/3/0/8/130814863/130814863.html#canon+5dsr+manuale+italiano
    • http://heavydutysignframes.com/uploads/1/3/1/1/131164573/kamowot.pdf
    • http://interactivecapitalgroup.com/uploads/1/3/0/2/130288430/pifimakepa_mujapev.pdf
    • http://aggressivedrivingclub.com/uploads/1/3/1/4/131408248/potoxegij_mufojinogubijiv_fugigutexuxep_xusisar.pdf
    • http://mensshirtsetc.com/uploads/1/3/1/1/131164011/vokikeb_jilafusoxetazo_zimetu.pdf
    • http://shippingmastersnd.com/uploads/1/3/1/0/131070071/wonaf.pdf
    • http://barcorealtyofaquia.com/uploads/1/3/0/6/130639305/5852991.pdf
    • http://doclambros.com/uploads/1/3/1/4/131453019/3892961.pdf
    • http://divinestyle.shop/uploads/1/3/0/5/130588740/b44347.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e8f.bin
ce68815e3fb2cddf0a0fe547e073cfd7f094922028c9fddd64786bbb519fc732		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8F 8472 bytes

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