Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1e6c66b516b1c1…

MALICIOUS

PDF

36.1 KB Created: 2020-06-06 17:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbb4395d1ab1c1a33789a099b3a087bb SHA-1: a92c1b82e25478b97b8c63a1699c6cc74ad540ae SHA-256: ee1e6c66b516b1c124dfa6d41a41052f762b9d149bb2f73a8445815b15493758
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL points to a document that appears to be a lure, potentially for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests a coordinated effort to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://crossfit-sneek.com/uploads/1/3/0/7/130740391/130740391.html#les+royaumes+oubli%25C3%25A9s+pdf
    • http://fhimbook.com/uploads/1/3/1/4/131410434/baee23cd.pdf
    • http://triumphontrails.com/uploads/1/3/0/6/130604273/modonib_bepunitug_mexekukebirig.pdf
    • http://robertion.com/uploads/1/3/1/1/131164204/viperifu.pdf
    • http://ininmotion.com/uploads/1/3/0/3/130312998/0c2c3e426868.pdf
    • http://amymariakidmohair.com/uploads/1/3/0/4/130488195/4670426.pdf
    • http://khayria.org/uploads/1/3/0/7/130775985/2807303.pdf
    • http://glebecourt.org/uploads/1/3/0/8/130874647/xawudebamid.pdf
    • http://allaroundtowing.com.au/uploads/1/3/1/4/131483197/9780550.pdf
    • http://freepocketlistings.com/uploads/1/3/1/4/131438459/3007715.pdf
    • http://postmaster.photopozza.com/uploads/1/3/0/6/130639751/1481490.pdf
    • http://crossfit-sneek.com/uploads/1/3/0/7/130740391/terms.html
    • http://crossfit-sneek.com/uploads/1/3/0/7/130740391/dmca.html
    • http://crossfit-sneek.com/uploads/1/3/0/7/130740391/policy.html
    • https://pusamurivu.files.wordpress.com/2020/06/lojivemigalumupatedo.pdf
    • https://sonapose.files.wordpress.com/2020/06/64621453636.pdf
    • https://sewizud.files.wordpress.com/2020/06/43167353457.pdf
    • https://podanowusotu.files.wordpress.com/2020/06/bevagugolapiv.pdf
    • https://suganilevek.files.wordpress.com/2020/06/24485094919.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_off00005daf.bin
8e2c246fccba8d7754509096e61223e27af446af89f1a1782b7801c453c35913		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAF 11516 bytes

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