Malicious PDF — malware analysis report

Static analysis result for SHA-256 51e5792f2114de8a…

MALICIOUS

PDF

46.5 KB Created: 2020-04-02 22:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e579360ddb383604fd67bb534281eb46 SHA-1: f9c3840527c4410b73c925b552893bf4228e3cc1 SHA-256: 51e5792f2114de8acc8d907207858e03cc77c0e3157d6191a9562563bb110815
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, a technique commonly used for SEO poisoning or to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious. The presence of numerous numeric and slug-based URLs suggests an attempt to create a link farm for search engine manipulation, likely leading to a malicious payload or phishing site.

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://eleanorfraser.com/uploads/1/3/0/8/130874127/130874127.html#kill+everyone+poker
    • http://happycatplace.com/uploads/1/3/0/2/130292007/2204130.pdf
    • http://caringangelshomeofflorida.com/uploads/1/3/0/4/130489800/namas.pdf
    • http://followyournosepets.com/uploads/1/3/0/7/130776159/ruxezunet.pdf
    • http://saxtoncontracting.com/uploads/1/3/0/4/130483514/5f23a72.pdf
    • http://townofclermont.com/uploads/1/3/0/6/130603832/9154946.pdf
    • http://noshsweettables.com/uploads/1/3/0/3/130312961/dajogomafovewovax.pdf
    • http://valleproperties.net/uploads/1/3/0/7/130776026/2058812.pdf
    • http://mycirinoart.com/uploads/1/3/0/5/130539518/6400973.pdf
    • http://purplesagehealing.net/uploads/1/3/0/2/130288637/gisevufutowo.pdf
    • http://ns1.chicoanimalshelter.org/uploads/1/3/0/7/130738955/notuzibalubiv-kalijize-vulik-sefupejuv.pdf
    • http://winstonsalemkids.com/uploads/1/3/0/6/130639545/bb9e50.pdf
    • http://victor-chiu.com/uploads/1/3/0/4/130476514/2625064.pdf
    • http://lmmsbeatsforlife.com/uploads/1/3/0/9/130969811/3037114.pdf
    • http://lenaeu.com/uploads/1/3/0/5/130588213/jiluzifaximu.pdf
    • http://ambracanevari.com/uploads/1/3/0/6/130621278/6788095.pdf
    • http://carablueadams.com/uploads/1/3/0/6/130621182/jolebumukupopafumet.pdf
    • http://renoheadlightrescue.com/uploads/1/3/0/8/130814728/9988651.pdf
    • http://fcparucis.com/uploads/1/3/0/7/130776017/5917670.pdf
    • http://cbcsomerset.com/uploads/1/3/0/5/130551615/kabukojekipa.pdf
    • http://lightthemuse.com/uploads/1/3/0/2/130272282/3656833.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_off00008d49.bin
e64b8b7a066aa6f6d65db08a6fb3cde4183c5b9b7290b3c07281df5a53113a2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D49 7740 bytes

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