Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac34169afa1c480f…

MALICIOUS

PDF

71.6 KB Created: 2020-03-25 00:43:20 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8b06da69d5b46c0dcbde9ebf55b138aa SHA-1: a67fb66babce46af4e5b4dc0331d4a7c6718f7d1 SHA-256: ac34169afa1c480f704e1def64b4d56befb27b063ea23ffd6932266369e2620f
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to similarly structured URLs on different domains. The document body, though partially obfuscated, contains the title 'Como puedo hacer un ensayo critico' and references wkhtmltopdf, suggesting a lure to a fake critical essay. The primary heuristic 'PDF_SEO_LINK_FARM' indicates a mass link farm, strongly suggesting a phishing or SEO poisoning attack. The embedded URLs likely lead to malicious content or further phishing pages.

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://pragueprivatetransfers.com/uploads/1/3/0/8/130814457/130814457.html#como+puedo+hacer+un+ensayo+critico
    • http://neighbors4christ.org/uploads/1/3/0/6/130639393/wiwafukewedo.pdf
    • http://busybeesdisposal.com/uploads/1/3/0/4/130490399/pibuverulizuled.pdf
    • http://movertoolkit.com/uploads/1/3/0/3/130313066/jexivikus.pdf
    • http://international-jobs4u.com/uploads/1/3/0/5/130539992/xasuzaju.pdf
    • http://lmpsychotherapy.com/uploads/1/3/0/4/130489410/8931881.pdf
    • http://www.therealpatikayy.com/uploads/1/3/0/7/130739392/misime_nixos_bolabalo_fovakejoku.pdf
    • http://maingatefleamarketprices.com/uploads/1/3/0/5/130551907/lovuxutedolagep.pdf
    • http://cleanandsoberuniversity.org/uploads/1/3/0/4/130477915/f18986fad6.pdf
    • http://hostmaster.text-solutions.co.uk/uploads/1/3/0/5/130543025/cd8deab8.pdf
    • http://www.newborntaxidermy.com/uploads/1/3/0/5/130551391/8409561.pdf
    • http://ordinariatesouthmanchester.com/uploads/1/3/0/4/130476873/jimolip-rojozat-napuritami-susav.pdf
    • http://jessica-shearer.com/uploads/1/3/0/7/130738988/cffba7.pdf
    • http://misguidedinthemagnolia.com/uploads/1/3/0/3/130313718/ganuzo-mifuxiwevabore-bunaz-gexatemujox.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_off0000d7e7.bin
fc53c5eb93c6a50d2e3ee0942befc17d42433d0bd55d63d29ade0e05241c4a2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E7 9608 bytes
font_01_sfnt_off0000fa31.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA31 16036 bytes

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