Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbee29ffc983ae6c…

MALICIOUS

PDF

39.5 KB Created: 2020-03-24 13:45:04 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e61a6d0b1e257cd2ce0ffe43e8cf7be4 SHA-1: b42ac9a26d7193ce8d9a97b79f14bffe0882ee9a SHA-256: dbee29ffc983ae6c26d080f467f492f47b2a63aec8325718ddfc7603854416bb
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly flagged this PDF as malicious. The presence of numerous links to similarly structured PDF files suggests a link farm or a coordinated distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://neokundalini.org/uploads/1/3/0/6/130604498/130604498.html#does+sonic+chocolate+shake+have+gluten
    • http://www.flock13.com/uploads/1/3/0/8/130874239/56ed807f.pdf
    • http://clovercollaboration.com/uploads/1/3/0/7/130739690/711cae1963.pdf
    • http://tiggersmainecoon.com/uploads/1/3/0/5/130588550/8898226.pdf
    • http://myanmardiscover.com/uploads/1/3/0/5/130543373/6774590.pdf
    • http://kiserrei.com/uploads/1/3/0/7/130739895/bejupijagozitib.pdf
    • http://northeastmarineelectric.com/uploads/1/3/0/3/130323210/776a944.pdf
    • http://suncoastbusinessbrokersinc.com/uploads/1/3/0/6/130639448/f4467a01ade1559.pdf
    • http://www.theshopon180.com/uploads/1/3/0/7/130739049/805998fd.pdf
    • http://basiliols.com/uploads/1/3/0/5/130543369/zivilafazef.pdf
    • http://hostmaster.danfrenchillustration.com/uploads/1/3/0/9/130969222/torize.pdf
    • http://rosereminiscence.com/uploads/1/3/0/6/130605162/296737c871520f6.pdf
    • http://jesusthemouthpainter.com/uploads/1/3/0/4/130476887/12398f83ae8ac1c.pdf
    • http://admin.markredwood.co.uk/uploads/1/3/0/3/130312952/71df56c9bc7aa.pdf
    • http://openhousecompass.com/uploads/1/3/0/6/130621033/bubuvoxedabona_dodebabirupig_doxepikuzitem_jigetezedumozu.pdf
    • http://damathitsar.com/uploads/1/3/0/4/130477455/lizelufubexiko.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_off0000706d.bin
0c899b6cf7d07c950d859f50834034ebae8496be51f8c516206f68698f190587		 pdf-font-stream PDF embedded font (sfnt) at offset 0x706D 8568 bytes

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