Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c781b5acd996870…

MALICIOUS

PDF

34.0 KB Created: 2020-04-18 03:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4d4ef33edc9182cbf4aeb18c47efd749 SHA-1: 4b8a3f511c9e0b64ecfbc5da7148fab13553e2fa SHA-256: 3c781b5acd99687068e0e0b90c505483e97b7db17eacfb057c11cc3fc02eba5d
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which are hosted on newly registered domains and appear to be part of a link farm designed to improve search engine rankings. The document body, though partially corrupted, contains text related to sheet music, suggesting a lure to disguise the malicious intent. The primary heuristic indicates a PDF SEO link farm, suggesting the document's purpose is to drive traffic to these external sites, likely for phishing or malware distribution.

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://robbinsroostrealestate.com/uploads/1/3/0/4/130435573/130435573.html#ashokan+farewell+violin+and+guitar+sheet+music
    • http://snarfoundation.org/uploads/1/3/0/3/130323647/6268f67783.pdf
    • http://stevejager.com/uploads/1/3/0/6/130620519/8c450.pdf
    • http://dianneballanceportfolio.com/uploads/1/3/0/7/130775539/1017215.pdf
    • http://battledore.ca/uploads/1/3/0/4/130489023/pozakim.pdf
    • http://pommades.be/uploads/1/3/0/2/130288316/c5c215311d3a4b6.pdf
    • http://mediatech-concepts.com/uploads/1/3/0/7/130740117/3340832.pdf
    • http://globalgovernanceresearchfund.org/uploads/1/3/0/2/130292073/vazefoxamom-xuwujavem.pdf
    • http://charityperks.org/uploads/1/3/1/0/131070030/6863969.pdf
    • http://vuaaa.org/uploads/1/3/1/3/131398024/rerum_bakumasalifexin.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_off00005b82.bin
b4558df9dcbf92b4f795e677f8f4dd2bad81cd7226343803a94eb35c78a21c3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B82 8736 bytes

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