Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ce3374c9487aa4…

MALICIOUS

PDF

97.3 KB Created: 2020-06-11 22:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abe092bdc4d70499fd368634b6b6143a SHA-1: 432ed0e9a309be2a3f4995737d2857ee85678528 SHA-256: 58ce3374c9487aa48aae0ef48ac9fa6bd9d9bc80e7724bdd658d8d5e0905fd5a
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body also contains embedded URLs, including one pointing to 'athairohiosportswear.com'. These links suggest a pattern of redirecting users to potentially malicious or SEO-manipulated websites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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
  • 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://athairohiosportswear.com/uploads/1/3/0/2/130289541/130289541.html#lauterbach+debugger+tutorial
    • http://danielamstutzcollective.net/uploads/1/3/1/4/131408056/xazelun_fibil.pdf
    • http://ameliakeene.com/uploads/1/3/0/2/130287871/sigizuzopamono.pdf
    • http://nintendoplanet.net/uploads/1/3/1/1/131164229/6416334.pdf
    • http://troutjockey.com/uploads/1/3/0/2/130288751/5355538.pdf
    • https://puxekagoduse.files.wordpress.com/2020/06/tewinasibapupidazijeva.pdf
    • https://zezumova.files.wordpress.com/2020/06/70611566753.pdf
    • https://taxanif.files.wordpress.com/2020/06/20838448824.pdf
    • https://kitiwuxe.files.wordpress.com/2020/06/bonafosoge.pdf
    • https://benozijef.files.wordpress.com/2020/06/vivinawivux.pdf
    • https://rigumiroviwe.files.wordpress.com/2020/06/77150007844.pdf
    • https://bilivogeji390496675.files.wordpress.com/2020/06/88100126878.pdf
    • https://dugazide.files.wordpress.com/2020/06/xenaxobukadizeraluwameji.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_off0000c4a2.bin
a38d6ee1ca0c5384a6c91b02cdb3ddced9ce1404d3669656544b3f9e31dee400		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A2 52456 bytes
font_01_sfnt_off000150ad.bin
bfa98c5fb354a3aa0e51a08195968d2a096301e1ed74e379542f0198b575f458		 pdf-font-stream PDF embedded font (sfnt) at offset 0x150AD 11164 bytes

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