Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b56915c5f5d7c8…

MALICIOUS

PDF

47.7 KB Created: 2020-03-22 06:17:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9d01300e945a77c590a4743fa0928089 SHA-1: 6488e6a8ffa9304c4fb2388f4f53effcd4cdd4de SHA-256: 34b56915c5f5d7c80505d67781605c61ad78bdd69126b97b5c2c317a781ed330
92 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, many of which point to other PDF files hosted on various domains. The document body text, though partially corrupted, includes a medical term ('Otitis media aguda no supurativa tratamiento') which may serve as a lure. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests a link-farming or SEO manipulation tactic, likely intended to drive traffic to malicious sites or to host further malicious content. No scripts were extracted from this sample.

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://loveloaves.net/uploads/1/3/0/9/130969664/130969664.html#otitis+media+aguda+no+supurativa+tratamiento
    • http://unitedinterfaith.org/uploads/1/3/0/8/130814311/6900668.pdf
    • http://bulletmotorsport.com/uploads/1/3/0/8/130873907/sunugotit.pdf
    • http://rsvdealerservices.com/uploads/1/3/0/7/130739023/94675731c7cf.pdf
    • http://kazang.org/uploads/1/3/0/2/130287533/tinun-sonutisenadojom.pdf
    • http://carlostorreblanca.es/uploads/1/3/0/6/130604947/115369.pdf
    • http://tridipanelhawaii.com/uploads/1/3/0/6/130620929/wikibolegerej.pdf
    • http://guidelightent.com/uploads/1/3/0/4/130488357/5369492.pdf
    • http://theluxycloset.online/uploads/1/3/0/6/130639683/1690638.pdf
    • http://taxtitle.net/uploads/1/3/0/5/130589205/radawolubajebit-kobudugenibaj-lupedixuje.pdf
    • http://cigmamotorsports.com/uploads/1/3/0/5/130588370/7724507.pdf
    • http://tucsoncatalyst.org/uploads/1/3/0/4/130475973/tebulin.pdf
    • http://barefoottofino.com/uploads/1/3/0/8/130814129/sulunumuxiniviro.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_off00009042.bin
68422d41526d5f275243bbb2ccff718805214c6ab870764be4a2f1002f979aed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9042 8732 bytes

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