Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1315bfea362c0d1…

MALICIOUS

PDF

40.4 KB Created: 2020-04-23 07:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 83d6e0efe40987acc0cc275bd663df7c SHA-1: 59d42bf630a27914ca05d77c81d90fa3609d937f SHA-256: f1315bfea362c0d14ff95d450e425aebad90fab38cea30458c044d35176ccee1
62 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute further malicious content. The document body itself is heavily obfuscated and contains what appears to be junk data, but also includes URLs that are part of the link farm. The primary attack pattern involves directing users to a network of external PDF files hosted across numerous domains.

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://rustysrusticroost.net/uploads/1/3/0/5/130539442/130539442.html#business+environment+book+by+francis+cherunilam+pdf
    • http://larimarmarket.org/uploads/1/3/1/4/131438448/nutugejadivisiw_mafoz_gojunilijufasu_zegodonilokelo.pdf
    • http://roldic.net/uploads/1/3/1/4/131406391/lanotigidug.pdf
    • http://lifevinechurchtx.com/uploads/1/3/0/6/130620843/759325.pdf
    • http://thecrownsportspub.com/uploads/1/3/0/3/130379206/binekij.pdf
    • http://ihotispolis.com/uploads/1/3/1/4/131482988/gufes.pdf
    • http://stegallsnurseryandplantfarminc.net/uploads/1/3/0/4/130476878/firajopin.pdf
    • http://depositdefenders.com/uploads/1/3/0/2/130287289/duvulaxuwumosati.pdf
    • http://sineathelrctric.com/uploads/1/3/0/2/130288540/dukufijirakogaz-naluliwuxomuz-bofalefapi.pdf
    • http://zibiy.com/uploads/1/3/0/6/130639658/6552968.pdf
    • http://loopielusweets.com/uploads/1/3/1/3/131398412/d52de099ed.pdf
    • http://cornerstonemindbody.com/uploads/1/3/1/4/131483234/eafaee234a688b6.pdf
    • http://purdonconsulting.com/uploads/1/3/1/3/131398128/660c8a88cd7719.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_off00007592.bin
d0fa2e36d5df219782a143ec6e9d331ba23cbea3818459b971a4bc974ebf7a87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7592 8056 bytes

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