Malicious PDF — malware analysis report

Static analysis result for SHA-256 32303c0ee4dcddb3…

MALICIOUS

PDF

43.0 KB Created: 2020-04-17 10:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e009d32c37c964bb1d041b8373da3880 SHA-1: 91d1f6300dc2cd1e103de18832b1d7f5e8a06fac SHA-256: 32303c0ee4dcddb36a58d371ccda2050004013c919c8707bbe611d43d887e6af
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body contains what appears to be metadata and a single URL, but the primary malicious activity is the mass linking to external sites. No scripts were extracted from this sample.

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://whittierpipe.com/uploads/1/3/0/4/130435905/130435905.html#adarsh+shinde+songs
    • http://kylechristensenactor.com/uploads/1/3/0/8/130814226/fuzawinib_movamewifax_vosixesud.pdf
    • http://oriolecreative.com/uploads/1/3/0/4/130483645/1621609.pdf
    • http://lunarain.net/uploads/1/3/0/4/130488227/saxikejejani_fuserejolop_rufoge_bitelasoza.pdf
    • http://missalliesplayhouseandpreschool.com/uploads/1/3/0/5/130543684/vepuwatakimeku.pdf
    • http://behdaar.org/uploads/1/3/0/5/130589140/gojix-zokokedelu-kurejijedizuvux.pdf
    • http://milanomanutenzioni.com/uploads/1/3/1/4/131436991/vufepilibuteda.pdf
    • http://ghrozay.com/uploads/1/3/0/8/130874617/cd9e7d6bc.pdf
    • http://pinckardmedia.com/uploads/1/3/0/5/130539125/0bbcb1f3.pdf
    • http://zenexbcs.com/uploads/1/3/0/6/130639936/d34623c000.pdf
    • http://johnsonchurchconsulting.com/uploads/1/3/0/6/130620222/wevugurosokelut-fuzokobezapofu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006143.bin
b7217c30f77319abc57560789c82fae8459b5c1dde2623d20ded78c2b948995f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6143 7940 bytes
font_01_sfnt_off0000801a.bin
02bacbc2ea291184bdecfffc86142e62c2679b0db90afab9db653af7e73e1fdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x801A 11472 bytes

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