Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b3eb16e96ef4554…

MALICIOUS

PDF

44.8 KB Created: 2020-03-31 20:29:14 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6f4fcf4230143076ada1886c6541028a SHA-1: e2d1a84e95bbb14bcf5def9afe6ab04e7bfab1f5 SHA-256: 4b3eb16e96ef455486b729574d898de5f60aef2a7014a1c9cfee920cf193271b
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, a technique often used for SEO manipulation or to redirect users to malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, indicating a potential attempt to drive traffic to a network of related domains. No scripts were extracted from this sample, limiting the ability to determine a more specific attack vector beyond link farming.

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://ctande.com/uploads/1/3/0/4/130488851/130488851.html#diferencia+de+electronegatividad+de+un+enlace+covalente+polar
    • http://stineslnc.com/uploads/1/3/0/4/130483155/wurapuduxesal-juvobamijelur-xuripuku.pdf
    • http://901pressurewash.com/uploads/1/3/0/2/130289686/3294887.pdf
    • http://azgallbladder.com/uploads/1/3/1/1/131164023/zekobazum.pdf
    • http://kickarena.ch/uploads/1/3/0/6/130604133/81f77753f7.pdf
    • http://sytenacity.com/uploads/1/3/1/4/131438176/zijonanepuza.pdf
    • http://bakedwithlove.net/uploads/1/3/0/4/130435710/734ab3.pdf
    • http://momnovel.com/uploads/1/3/0/5/130550884/40e2288bcd6c8db.pdf
    • http://wuebcomms.com/uploads/1/3/0/4/130488432/gipuji.pdf
    • http://vallejotreeservice.com/uploads/1/3/0/8/130814232/2656017.pdf
    • http://kyledropp.com/uploads/1/3/0/7/130740376/8750f06f.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_off000077be.bin
d4cf3b451ecea56e59ec6b544ba212efe48d4127c783fa076708f3560c430e53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77BE 9128 bytes
font_01_sfnt_off000098c0.bin
f2b2d2541310e48b646326bd6ebc229c9e9b9b71f84a9581776d214cedfbaeef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98C0 3068 bytes

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