Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4b462df119a456…

MALICIOUS

PDF

37.2 KB Created: 2020-04-03 12:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b4658345418b2c65007277dc9c383d54 SHA-1: 47804cba3d11885d5bf91bc6da99ae90a7314076 SHA-256: be4b462df119a4561892e01a9d30bb9f7004cf33745f354918c9f5e4eae679cd
92 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a large farm of external links to other PDF documents hosted on various domains. The primary attack pattern appears to be SEO manipulation or a link distribution scheme, leveraging a large number of seemingly unrelated domains. The document body contains garbled text and embedded URLs, reinforcing the link-based nature of the attack.

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://dualacs2.org/uploads/1/3/0/8/130874535/130874535.html#the+book+thief+themes+prezi
    • http://modernwellnesscoach.com/uploads/1/3/0/5/130543276/gaduvub-repekef-xikiguwozitojaw-nimitetuwo.pdf
    • http://restauranteamarca.com/uploads/1/3/1/3/131384136/zulunoze.pdf
    • http://jtwebmarketing.com/uploads/1/3/0/6/130640181/vamuragenukanotutoku.pdf
    • http://mountaingatewaytraining.org/uploads/1/3/0/9/130969065/tanazavuxoz-vofobedodemu-dotaj.pdf
    • http://beyondthebackcountry.com/uploads/1/3/1/3/131379774/622c9e31c.pdf
    • http://yarnislove.com/uploads/1/3/0/4/130488509/xejobab.pdf
    • http://releifricktal.ch/uploads/1/3/0/6/130620791/pilanakexovami-barojoza-bulogimomafas-xikidule.pdf
    • http://edwardsfinds.com/uploads/1/3/0/6/130639733/2502587.pdf
    • http://74-123-77-240.mgwnet.com/uploads/1/3/1/1/131163793/lawedomox_nazures_wamirajifojezem.pdf
    • http://newelementkc.com/uploads/1/3/0/7/130738814/45af422c2c.pdf
    • http://bitemenewengland.com/uploads/1/3/0/9/130969587/kaleninuji_jomusijomuranom_domebukezikakev.pdf
    • http://wowees.com/uploads/1/3/0/6/130605094/3559440.pdf
    • http://centrepointebusinesspark.com/uploads/1/3/0/4/130436365/xopojug.pdf
    • http://onlymadeinthe.us/uploads/1/3/0/5/130589208/vajitafemo.pdf
    • http://andreasalgava.com/uploads/1/3/0/6/130621447/9646030.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_off00006a96.bin
25f87798f419ef4e182f5ff78e44fc39d12a1a52f543201dc93dd1ca9067b8b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A96 7404 bytes

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