Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b9c245981715421…

MALICIOUS

PDF

37.7 KB Created: 2020-03-30 03:13:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a5ecea87811537851e6c5f9732f2ca6e SHA-1: 5c1a71949cacd88804ee5405fbe477e2b7b54ee0 SHA-256: 2b9c245981715421968a1d5aa933bfa91c10140d0e6735cecc4a126b825cf468
92 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gathering Victim Identity Information T1204 Malicious Link

The PDF contains a large number of external links, many of which point to other PDF files on different domains. This suggests a link farm or SEO manipulation tactic. The document body contains garbled text and a URL, indicating it's not intended for legitimate user consumption. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious link distribution scheme.

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://nursingarmpillow.com/uploads/1/3/1/0/131070571/131070571.html#costo+horario+retroexcavadora+con+martillo
    • http://brooklynbouquets.com/uploads/1/3/0/4/130476885/9fa883f383.pdf
    • http://vincenzolittleitaly.com/uploads/1/3/0/6/130621544/6267404.pdf
    • http://uglyfireplaces.com/uploads/1/3/0/6/130639024/zoluni.pdf
    • http://draftav.com/uploads/1/3/0/7/130775624/3879175.pdf
    • http://claraesmorisphoto.com/uploads/1/3/0/7/130739182/4419740.pdf
    • http://toubkalwebtv.net/uploads/1/3/0/8/130874213/kotuxemosiriji.pdf
    • http://gen-music.com/uploads/1/3/0/7/130775395/67787f23.pdf
    • http://amigosbbqgrill.com/uploads/1/3/0/6/130604344/5173390.pdf
    • http://2texasdips.com/uploads/1/3/1/3/131384636/duwadurudemoke-lavuxewumokud-fonasapefugo-jegor.pdf
    • http://avios.info/uploads/1/3/0/7/130775476/setevipuleloroxobi.pdf
    • http://chowny.com/uploads/1/3/0/7/130739528/5621558.pdf
    • http://teslasolarusa.com/uploads/1/3/0/3/130312951/3295114.pdf
    • http://sawcounselingcenter.com/uploads/1/3/0/4/130483937/wufasesumo_kidotoxiwoju.pdf
    • http://passopweg.com/uploads/1/3/1/3/131384254/f770d.pdf
    • http://kishthehandyman.net/uploads/1/3/0/5/130588594/sokevex_tokasomon_joredore_vonulosotaxeg.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_off00006774.bin
c7cb7804aa48a1f0e94ca53fa1d0940b1978e2971a0af310cc875a12882c3cb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6774 8876 bytes

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