Malicious PDF — malware analysis report

Static analysis result for SHA-256 21e1beac5c58398b…

MALICIOUS

PDF

37.5 KB Created: 2020-04-08 13:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bee7f2c47bda8aa6ec29a5605e2a58a6 SHA-1: b220831ad8c76990860288c43e830bf361a347a9 SHA-256: 21e1beac5c58398bb737feb53129f80692a1230b5706f58d2f8dd3f5bf06b2a2
92 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, with numerous external URLs embedded within its structure. The document body, though partially corrupted, contains a reference to 'Numero servicio al cliente de verizon wireless', suggesting a lure to trick users into clicking on the provided links. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a large number of external links, likely intended to direct users to malicious content or phishing pages.

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://fortworthchiomega.com/uploads/1/3/0/3/130323693/130323693.html#numero+servicio+al+cliente+de+verizon+wireless
    • http://hardingfamilytree.com/uploads/1/3/1/3/131381067/2207787.pdf
    • http://goldenmprinting.com/uploads/1/3/0/6/130620700/rukoja.pdf
    • http://eagleplasteringinc.com/uploads/1/3/0/2/130287285/63c55e9d04a1f30.pdf
    • http://novazaco.com/uploads/1/3/0/6/130605153/zewujutusaxefas.pdf
    • http://tag-study.com/uploads/1/3/0/8/130814914/fimox_sekeso_bukenolasufise.pdf
    • http://pointvertpm.com/uploads/1/3/0/4/130476511/milopet-wumamudoz-jajenefubofebi.pdf
    • http://misshufnagel.com/uploads/1/3/0/9/130969599/rorax-sorem.pdf
    • http://unkocdn.com/uploads/1/3/0/8/130813736/fuzaxikixusize.pdf
    • http://muscle-munchies.com/uploads/1/3/0/6/130621000/84619f7e9a2fe8.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_off0000655a.bin
3a7729de9f39771afbd3d2d2969139f26c0e2dc0a493b4f27bc6b661eec05eee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x655A 9336 bytes

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