Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e64eb16de99f60…

MALICIOUS

PDF

91.2 KB Created: 2020-04-05 11:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a6cb4d725ac64a9f02dd409427668676 SHA-1: 536c9babd23ca43f05a27bfdc2888b43bee4fd16 SHA-256: a2e64eb16de99f60b3aa79d34e82250b571bae4f87e17cd294a67b14dc0d2013
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many of which are numerically or generically named, indicating a link farm or SEO spam tactic. The document body, though truncated, mentions 'Harvest moon friends of mineral town win cooking festival', suggesting a lure to attract users interested in gaming. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9776

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://emirateszajil.com/uploads/1/3/0/5/130588850/130588850.html#harvest+moon+friends+of+mineral+town+win+cooking+festival
    • http://shadyblueamstaffs.com/uploads/1/3/0/2/130288720/9517093.pdf
    • http://spliceoflifefilms.com/uploads/1/3/0/6/130603894/xomopimaxiterun_tejowof_mipawizaxalon_revotomamara.pdf
    • http://clmartin.info/uploads/1/3/0/9/130969186/fagatiz.pdf
    • http://agirlskingdom.com/uploads/1/3/0/4/130489226/tijumogeka_gibuvalizoreme_dusabi.pdf
    • http://dawn-hudson.com/uploads/1/3/0/8/130814675/88ee95ffbce.pdf
    • http://townapparel.shop/uploads/1/3/1/4/131409127/1451286.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012633.bin
c2e8146e3a3442a7feabf7b34186ededcd6ce8a1b7efce94600071ee6c851d2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12633 9424 bytes
font_01_sfnt_off000149df.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x149DF 16204 bytes

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