Malicious PDF — malware analysis report

Static analysis result for SHA-256 5493b197a4570424…

MALICIOUS

PDF

34.9 KB Created: 2020-03-21 21:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: accbafe66452d0df695eed176ac5f5df SHA-1: f4045b1fdb6888e46045f80650832774844fdbd3 SHA-256: 5493b197a45704244c68dac0b1a67f09c475e48882fd3943c8ba80e5008339e0
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to various domains, a technique often used for SEO manipulation or to distribute further malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this pattern. The ML classifier also strongly indicates maliciousness. The embedded URLs are the primary indicators of compromise.

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://hyperion-ai.com/uploads/1/3/0/4/130489230/130489230.html#alg+2+sol+formula+sheet
    • http://millymop.co.uk/uploads/1/3/0/2/130272955/001a5ac814b2f76.pdf
    • http://mta-sts.penetron.lt/uploads/1/3/0/7/130776315/vevijubif-vukavixanape.pdf
    • http://nativfitness.net/uploads/1/3/0/2/130288364/5021066.pdf
    • http://www.plaqueprofessionals.com/uploads/1/3/0/7/130740256/sedijikije.pdf
    • http://relaxedskincarefacefullbodyservices.com/uploads/1/3/0/7/130775911/pavuzilulenake.pdf
    • http://www.sharonbrownfitness.com/uploads/1/3/0/5/130588780/6265753.pdf
    • http://whitewillowvintage.com/uploads/1/3/0/3/130313253/616466.pdf
    • http://www.blackouttrading.com/uploads/1/3/0/6/130639995/fumoxovobubutelat.pdf
    • http://novitaconsultoria.com/uploads/1/3/0/4/130489132/xurabi_birudazajoxoxi.pdf
    • http://globalyouthexpo.com/uploads/1/3/0/8/130813094/limusobudeviner.pdf
    • http://boutiquebyjes.com/uploads/1/3/0/8/130874668/toruburuza.pdf
    • http://speakenglishnaturally.me/uploads/1/3/0/2/130272365/tadenovak-vajil-jojapimapu-piles.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_off00006142.bin
f4b3c8297ea1c269dd2f11b143352ac365d4a0c2ed7df6630b3aa48435c129f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6142 7592 bytes

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