Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4f468b1850bb7d…

MALICIOUS

PDF

38.6 KB Created: 2020-04-10 00:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3b6a876832edce629438ac3532556d26 SHA-1: 9fe8e468b81b71e8de4a07a9b5690204d0615c8a SHA-256: fb4f468b1850bb7d227f939aebbb76d9d9f5812e8034009ca6df3ec4c84f0077
62 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on numerous domains, suggesting a link farm or SEO poisoning tactic. The document body contains garbled text and a reference to 'shell shockers blocked', which is likely a lure. No scripts were extracted, and the primary malicious activity appears to be directing users to external content.

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://speelkoning.net/uploads/1/3/0/5/130539935/130539935.html#shell+shockers+blocked
    • http://art-by-coco.com/uploads/1/3/1/3/131378795/mamikuvutezedu.pdf
    • http://youngbloodz.net/uploads/1/3/1/0/131070983/5173d.pdf
    • http://trinkaus.services/uploads/1/3/0/5/130589243/20b9040eae1e43.pdf
    • http://eco-friendlycleaningservices.com/uploads/1/3/0/7/130775756/rolagobasev_nepipabus.pdf
    • http://explorekaizenkids.com/uploads/1/3/1/0/131071019/6cc68bbb.pdf
    • http://congresoselis.info/uploads/1/3/0/5/130588824/073daa9b7.pdf
    • http://cpdforoncology.net/uploads/1/3/0/6/130639973/1193890.pdf
    • http://wennbergcontracting.com/uploads/1/3/1/3/131380953/4231682.pdf
    • http://proventwindows.com/uploads/1/3/0/7/130775748/jevaverojujig.pdf
    • http://chanjaafricanboutique.biz/uploads/1/3/0/2/130272384/difonibal.pdf
    • http://asfacilityservices.com/uploads/1/3/0/8/130814234/bizudabajenuved.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_off00006f6f.bin
21a041d4ee0479a8220e0360821c5014cd3b6b3e1720233cf2571497677dde50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6F 7724 bytes

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