Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf5e2ff48d0489c…

MALICIOUS

PDF

37.3 KB Created: 2020-06-06 05:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1090180ad01b2336e3a8571b7fee6590 SHA-1: 03c4f9caf67181939e0b179f71fb725f0f5fb39f SHA-256: 4cf5e2ff48d0489c39445f9ac5d36ec33da66f729e18365df765b1871a537b5f
94 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, pointing to various domains. The document body text, though partially corrupted, includes the phrase 'Do what you love the money will follow pdf', suggesting a lure. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves directing users to a network of SEO-optimized PDF files, likely for malicious redirection or content delivery.

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://scientoxicity.com/uploads/1/3/0/2/130289240/130289240.html#do+what+you+love+the+money+will+follow+pdf
    • http://starrtreatments.com/uploads/1/3/1/0/131070710/zopojakomawikurot.pdf
    • http://es.siestalashstudio.com/uploads/1/3/0/5/130588775/gabazuk.pdf
    • http://griefcounsellingottawa.com/uploads/1/3/1/3/131381553/wuwonod.pdf
    • http://host175.carmichaelnl.com/uploads/1/3/0/5/130589208/3692807.pdf
    • http://cpcontacts.handsomehounds.org/uploads/1/3/0/6/130639241/165183.pdf
    • http://floridanursinginstitute.org/uploads/1/3/0/7/130775027/ce99453fd47.pdf
    • http://hostmaster.sonyaparra.com/uploads/1/3/0/7/130739341/1401709.pdf
    • http://midwestmines.com/uploads/1/3/0/6/130620406/rubojizejolanexo.pdf
    • http://hostmaster.2seamills.co.uk/uploads/1/3/1/3/131379409/7693372.pdf
    • http://scientoxicity.com/uploads/1/3/0/2/130289240/terms.html
    • http://scientoxicity.com/uploads/1/3/0/2/130289240/dmca.html
    • http://scientoxicity.com/uploads/1/3/0/2/130289240/policy.html
    • http://hostmaster.2seamills.c
    • https://porugisi.files.wordpress.com/2020/06/24690744438.pdf
    • https://webiragev583896337.files.wordpress.com/2020/06/84936586665.pdf
    • https://lepezom.files.wordpress.com/2020/06/durukujubulax.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_off00006447.bin
7d4c824b69c1d9ca1dd07c0d83577f34f2a8d094251d714e29c2463b0b69f184		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6447 10728 bytes

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