Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47fafd1a6dadbeb…

MALICIOUS

PDF

36.4 KB Created: 2020-05-13 23:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e00bfe36eb666f2604e13d604c8e4007 SHA-1: e46d5163f480216fbfcd9e9a98e67926707b519b SHA-256: c47fafd1a6dadbebfd7b12069098a3d08db45df07eb53b6364f136dc98235834
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are numerically or generically named, suggesting a link farm for SEO manipulation or malware distribution. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains references to a 'Jotunheimen haute route guide' and the wkhtmltopdf application, indicating a potential lure. The primary attack pattern involves directing users to a network of suspicious external URLs.

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://aelmorris.com/uploads/1/3/0/7/130738821/130738821.html#jotunheimen+haute+route+guide
    • http://exoticanimalbreeders.com/uploads/1/3/0/5/130551823/pasosife.pdf
    • http://biodog.de/uploads/1/3/1/8/131856446/2314831.pdf
    • http://hardkopycosmetics.com/uploads/1/3/1/4/131483267/xosopi.pdf
    • http://meezzly.com/uploads/1/3/0/5/130588153/peguwo.pdf
    • http://joy-coach.com/uploads/1/3/1/6/131607047/tezewujiloxopos.pdf
    • http://krinema.com/uploads/1/3/0/5/130588685/wegafikoxifofo-jivusajapafe-limezew-wesewuzanasojij.pdf
    • http://thecountryovenbakery.com/uploads/1/3/0/3/130313590/dufuliw_niritudeb_dibiredusase.pdf
    • http://dugogalleria.com/uploads/1/3/0/8/130874435/sifopuperi_kewajaxoj.pdf
    • http://sovonconsultingsvc.com/uploads/1/3/0/8/130814718/e10e3a0.pdf
    • http://ward3onlinegames.com/uploads/1/3/0/5/130590550/zobowov.pdf
    • http://amarti63.com/uploads/1/3/1/1/131163890/zobima-sumagaxe-fisuk-wagasatokeku.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_off0000632e.bin
a74a6bef751417b78d9ec036ddd6da2ffacfbfaa9c21ded4212c949aff63df5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632E 10232 bytes

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