Malicious PDF — malware analysis report

Static analysis result for SHA-256 981ea7a63d1050c9…

MALICIOUS

PDF

59.0 KB Created: 2020-06-23 19:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad4a00ab8f2f1efe14f113580422fbb5 SHA-1: 78c541929bd9e4c8dd4fe16af50fb426ae5e98c0 SHA-256: 981ea7a63d1050c923ea2c2c0f9fc7dd5b334e4e9831b0eb91bd23deda8029b6
92 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for SEO poisoning or redirecting users to malicious sites. The document body, though heavily obfuscated, contains text suggesting it is a 't.v guide' and includes several URLs that are likely part of a link farm designed to attract search engine traffic. The ML classifier strongly indicates maliciousness, and the presence of multiple unknown external URLs supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://webmail.holidayhomecoming.org/uploads/1/3/0/4/130488415/130488415.html#rte+2+t.v+guide
    • http://mta-sts.mail.peculiaritypress.com/uploads/1/3/1/8/131857364/8ff1526258a.pdf
    • http://rootedcapitalmanagementgroup.com/uploads/1/3/0/6/130604758/7160780.pdf
    • http://davidjosephryan.com/uploads/1/3/0/4/130435659/a2dc355bb46.pdf
    • http://1kw.undesirable.us/uploads/1/3/2/7/132741433/6168832.pdf
    • http://wavradio.org/uploads/1/3/0/2/130270905/3576841.pdf
    • http://midwestundergroundinc.com/uploads/1/3/0/2/130289291/padaf.pdf
    • http://iphonephotoclub.org/uploads/1/3/2/6/132680813/9075242.pdf
    • http://coachroofing.com/uploads/1/3/1/3/131380066/jatisagifabixo.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_off0000ad84.bin
12b544054a5c246be9ab65880fe95e0b8a93ba48837c601418676f76e970fed1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD84 4376 bytes
font_01_sfnt_off0000bc7e.bin
b2e6671412983f4f784705937910cb69ed3c218471e9e282e0de4b5718ef72a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC7E 10408 bytes

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