Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a5b74db0068382…

MALICIOUS

PDF

31.9 KB Created: 2020-04-09 11:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8e3ebcce3fabe54062f0d538de8c727e SHA-1: ca334ebe04150f9374e5cdab7182d36fd14409b4 SHA-256: d5a5b74db0068382a249f157ceec4b6b4ec1b10656a509a4905dd079b36c70ca
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, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution mechanism. The document body itself is largely unreadable binary data, but the presence of numerous external URLs is the primary indicator of malicious intent. No scripts were extracted from this sample.

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://stromphoto.com/uploads/1/3/0/8/130874457/130874457.html#prueba+de+varianza+para+numeros+pseudoaleatorios
    • http://animalamicus.com/uploads/1/3/0/2/130270811/menamisenofuga.pdf
    • http://lisbonsecrets.co/uploads/1/3/1/3/131398487/pafegaxabo.pdf
    • http://mcclaffertygortahork.com/uploads/1/3/0/2/130287456/5313445.pdf
    • http://74-123-76-10.mgwnet.com/uploads/1/3/0/3/130379231/jabibufewizeda.pdf
    • http://theelitecloser.com/uploads/1/3/0/4/130476368/zuxawex.pdf
    • http://verifiedswitchboards.com/uploads/1/3/1/1/131164372/puliv.pdf
    • http://thebadassboss.com/uploads/1/3/0/6/130603749/tarokifijupuwi.pdf
    • http://micro-cadlimited.com/uploads/1/3/0/5/130588307/0aa58882c82f.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_off00005372.bin
00b74b5617f145ac9d6b0658666e616d380c600b002687bb145e1367be8d5e76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5372 7880 bytes

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