Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2298ce6dc1326d1…

MALICIOUS

PDF

37.9 KB Created: 2020-04-02 05:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 96dd006fb7e08df0d5e57fabbe60ebcc SHA-1: 2417b74692a94874330352430ddf7206acb1643c SHA-256: d2298ce6dc1326d181cd6f2227829c854c24f331b7a11d46bd181394dade1645
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, indicating a link farm for SEO purposes. One of the embedded links, 'http://racebaseuk.com/uploads/1/3/1/1/131164266/131164266.html#witcher+3+all+gwent+cards+mod', is presented as a lure for a game mod. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves directing users to download malicious content disguised as legitimate files.

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://racebaseuk.com/uploads/1/3/1/1/131164266/131164266.html#witcher+3+all+gwent+cards+mod
    • http://adsl-69-150-183-21.comfortltc.com/uploads/1/3/0/4/130483647/62f59c45.pdf
    • http://abcc-am.org/uploads/1/3/0/8/130874600/podunubode.pdf
    • http://falksierra.com/uploads/1/3/1/0/131069887/ritarijaj.pdf
    • http://postmaster.huis-theaterinmuziek.nl/uploads/1/3/0/7/130739618/luleguvixu.pdf
    • http://katlillies.com/uploads/1/3/0/4/130483428/dekiwemu-zezari-fomupatire.pdf
    • http://sparkdesigns.studio/uploads/1/3/0/5/130550912/8464789.pdf
    • http://cornerstonevet.net/uploads/1/3/0/5/130551271/8600484.pdf
    • http://hairs2u.services/uploads/1/3/0/7/130739235/julidizaxe-pexexo-nuxifozebofuwok-dekaguzibuwax.pdf
    • http://thechasegroup.org/uploads/1/3/0/2/130289288/febagoletebepil.pdf
    • http://midwestcraftshow.com/uploads/1/3/0/7/130776672/xopuvezunerogit_javajemusaki_dopud_debevit.pdf
    • http://prettylost.com/uploads/1/3/0/3/130313445/zewut.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_off00006bea.bin
bb5e553644509afc45617d7ba061ce39877eb4b2d988fdad9cd214595898505d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEA 8020 bytes

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