Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2c84a7b57cb769f…

MALICIOUS

PDF

41.1 KB Created: 2020-03-25 02:12:31 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b1a0349fc65db250ca2eff97d1ca9376 SHA-1: d27076b7a7395e94f1ad1711ed5433408d20109a SHA-256: a2c84a7b57cb769f5962e866254eed591fb95a85640de9877df17f2dd9716c9a
92 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 to other PDF files hosted on various domains. This behavior is indicative of a link farm or SEO manipulation tactic, which can be used to distribute malicious content or improve search engine rankings for malicious sites. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine the exact user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://pleasuretravels.net/uploads/1/3/0/9/130969971/130969971.html#ti-grace+atkinson+quotes
    • http://piggeriesfurniture.com/uploads/1/3/0/6/130639397/denukipopevoza_rezejusoxi_jozudokegusem.pdf
    • http://heyitstaay.net/uploads/1/3/0/3/130323789/13642f1dc209.pdf
    • http://lessonsforlittlelearners.com/uploads/1/3/0/2/130271095/sebedebo_bamuxolimedisam_tuxakamumabu.pdf
    • http://rubylencicki.com/uploads/1/3/0/6/130640090/1546702.pdf
    • http://insure-web.com/uploads/1/3/0/5/130590353/31aa157d9d9f90b.pdf
    • http://mobyzap.com/uploads/1/3/0/8/130814328/razinetujunerobuz.pdf
    • http://djspizza1.com/uploads/1/3/0/2/130288559/rifena_lewujobaboleme_kusujimuladati.pdf
    • http://lasilhouettelingerie.com/uploads/1/3/0/8/130874169/sisitejafusina.pdf
    • http://admin.clumsycourierwine.com/uploads/1/3/0/4/130483697/ziluruzuxuzitim-wosefokaxokur.pdf
    • http://www.starladeanmft.com/uploads/1/3/0/8/130874641/ranaletalin.pdf
    • http://bejoelled.com/uploads/1/3/0/4/130488446/lotedi.pdf
    • http://newearth.design/uploads/1/3/0/3/130313398/jufozeri_toxipiroge.pdf
    • http://empresselle.com/uploads/1/3/1/1/131164418/2933885.pdf
    • http://polinakorobkova.com/uploads/1/3/0/2/130270831/magorelela_vajeravaluvozez_rixug.pdf
    • http://analogi.us/uploads/1/3/0/5/130540882/gaxolew.pdf
    • http://kejiahu.com/uploads/1/3/0/2/130270834/wobaf-lerixigo-likop.pdf
    • http://trifoldmaps.com/uploads/1/3/0/7/130776603/1349625.pdf
    • http://michaeljcbarlow.com/uploads/1/3/0/8/130874536/363721c4.pdf
    • http://www.kerribeary.com/uploads/1/3/0/5/130588880/1958190.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_off0000776e.bin
0b1640065c4799fee765a3a96a51e7ad51c1891ebd00f8ab81ed385d66828d55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776E 7872 bytes

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