Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c0065b665351c6…

MALICIOUS

PDF

39.8 KB Created: 2020-03-23 04:38:55 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: af21f9b9d0a91cf10cdb36a6b0d029b9 SHA-1: e3275ff3e41c2e6bbc14c763f0c83f2550ec48d4 SHA-256: e1c0065b665351c66cd197c6f1e0ca3b2ee3ce43f5fc5c0b248ee5a97ca41e0f
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious PDF

The PDF contains a large number of external links, a technique often used for SEO spam or to distribute further malicious content. The document body, though partially corrupted, suggests a lure related to a card game. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://baylandesign.net/uploads/1/3/0/6/130620798/130620798.html#would+you+rather+card+game+instructions
    • http://mybagsies.com/uploads/1/3/0/8/130814245/xuvale_wazuvulis.pdf
    • http://southshoreinfusion.com/uploads/1/3/0/6/130620234/majawukej.pdf
    • http://www.turquoisestudio.com.au/uploads/1/3/0/6/130603958/2864f104d5e.pdf
    • http://www.fullreach.com.au/uploads/1/3/0/8/130814088/kejowo.pdf
    • http://domesticgoddessish.com/uploads/1/3/0/7/130738913/donan_bazana_jugijut.pdf
    • http://mail.mckinleylaw.net/uploads/1/3/0/6/130621597/lumanelusovukugasez.pdf
    • http://c3cherrybrook.com/uploads/1/3/0/7/130740259/167572.pdf
    • http://soblowedapparel.com/uploads/1/3/0/6/130639246/weroraxutuperitiwux.pdf
    • http://blakeconway.com/uploads/1/3/0/3/130379422/mevagu_waxuxak_kosixi_devidixejumebif.pdf
    • http://wedgesoverworkdays.com/uploads/1/3/0/6/130604729/wuronowusav.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069f3.bin
22011438a1a18c6bb61f73097ca373b5150954b031eb26333022211b1efb4fb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69F3 7820 bytes
font_01_sfnt_off00008863.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8863 2652 bytes

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