Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08a972080be4e1f…

MALICIOUS

PDF

31.6 KB Created: 2020-04-12 06:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3a6f3c148307af888dc89bf73f834e35 SHA-1: 02c7805533825e604319c7c7301964a9327d21b8 SHA-256: d08a972080be4e1fe3c64450f5d29c4183ef2950486d078e77cc32fede6ebdf5
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to 'Apa style word 2013' and URLs that appear to be part of a link farm. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests this is a malicious SEO tactic. No scripts were extracted from this sample, limiting the analysis of direct payload execution.

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://myconfidenceinc.com/uploads/1/3/0/7/130738884/130738884.html#apa+style+word+2013
    • http://dmozegift.com/uploads/1/3/0/9/130969130/1753133.pdf
    • http://ritameher.com/uploads/1/3/0/5/130588438/2903848.pdf
    • http://pinnaclemontco.com/uploads/1/3/1/1/131164322/rodowelilexejak_gipowuriwaduzap_juwikedunuj.pdf
    • http://gucra.com/uploads/1/3/1/3/131381919/1813302.pdf
    • http://rieanknight.com/uploads/1/3/0/6/130604258/d2ed158a.pdf
    • http://tammyburnsinsurance.com/uploads/1/3/0/6/130621873/2991251.pdf
    • http://ldsstrangite.org/uploads/1/3/0/7/130776866/kabesono-luwobujemid.pdf
    • http://sjgroupinc.net/uploads/1/3/0/4/130483900/fabiru-degigamiza.pdf
    • http://luckysclover.com/uploads/1/3/0/7/130740477/tunijenema.pdf
    • http://exitus-escaperooms.com/uploads/1/3/1/3/131379948/rizagibexaxix_femupu_fukavufimepis_mitiwub.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_off0000561f.bin
5a2fa1c58ceaf544fe2809a0e4440c3850f8da19a0431ecc26b946ad13ce51c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x561F 7296 bytes

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