Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3a2d4a6899c65ad…

MALICIOUS

PDF

35.0 KB Created: 2020-04-11 22:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1593f32e227bd7ecff0dff2f61d66dad SHA-1: 143c45649e667fcb7c4f61a5952e37128c839298 SHA-256: d3a2d4a6899c65ada2a29287353b173c380e18de5cde9c5ce078a71580229a17
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection tactic. The ML classifier also strongly indicated maliciousness. The document body appears to be corrupted or obfuscated, but the presence of numerous external URLs points towards a malicious intent, likely to distribute further malware or engage in SEO spam.

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://oklahomacityroofingprofessionals.com/uploads/1/3/0/6/130639743/130639743.html#el+principito+capitulo+3+y+4+resumen
    • http://winfieldepiscopal.org/uploads/1/3/0/6/130621060/mosikek-wuwinab-nedotugeteja.pdf
    • http://atlanta.diamonds/uploads/1/3/0/4/130476791/bakunatigidezo.pdf
    • http://straightstreetrecovery.org/uploads/1/3/0/4/130475996/kowusubo.pdf
    • http://thcayurvedics.net/uploads/1/3/0/3/130323547/maveganolavel-kisanirozedeli-kevewewizeva-gunulupaw.pdf
    • http://authenicwellness.com/uploads/1/3/0/6/130603982/wofovojin-terofidamu-ditalode-gemasi.pdf
    • http://emedastresssupport.nl/uploads/1/3/0/4/130490053/c0da77a6.pdf
    • http://futureplansfinancial.com/uploads/1/3/1/4/131407547/ninijirimakiw.pdf
    • http://suresecurityservices.com/uploads/1/3/0/9/130969381/9551149.pdf
    • http://darmofarm.com/uploads/1/3/0/6/130639256/5955832.pdf
    • http://artseedz.com/uploads/1/3/1/3/131378973/pukid.pdf
    • http://headmastersgroup.com/uploads/1/3/0/6/130620674/2593a9c91c1842a.pdf
    • http://headmastersgroup.com/uploads/1/3/0/6/13062
    • 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_off0000629f.bin
ae1e3e56cd3954d158bd187ad7ee2e7bcde9f57eb13eb4a74fb65c3ff787ddb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x629F 7816 bytes

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