Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ef82b039c61915…

MALICIOUS

PDF

41.0 KB Created: 2020-06-05 02:39:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cd767a4d30aee849b10649c2be5e7df SHA-1: 04354c241f4a9b10f96a3dd2743e45421b68f712 SHA-256: d0ef82b039c619150799bcbaebbb7302dda5e1f3a8b06a75b43c897a59a148cf
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files with numeric slugs, indicative of a link farm or SEO spam. The document body explicitly mentions downloading a movie, and one of the primary external URIs points to an HTML file that likely serves as a download page. The ML classifier strongly supports the malicious nature of this PDF.

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://cmcgpartners.com/uploads/1/3/0/5/130544968/130544968.html#download+jeepers+creepers+2+in+hindi+720p
    • http://karennorthgraves.com/uploads/1/3/0/6/130621267/dazerisizozusozap.pdf
    • http://lifewardliving.com/uploads/1/3/1/3/131397989/bojopulekomev.pdf
    • http://triad-electric.com/uploads/1/3/0/4/130490584/lopusemu.pdf
    • http://cpcontacts.acegenealogyresearch.com/uploads/1/3/0/6/130604682/186b4b42.pdf
    • http://perfectpeachapparel.com/uploads/1/3/1/6/131636744/folepusuto.pdf
    • http://1hv.undesirable.us/uploads/1/3/0/5/130588620/sazedobasusufev.pdf
    • http://cmcgpartners.com/uploads/1/3/0/5/130544968/terms.html
    • http://cmcgpartners.com/uploads/1/3/0/5/130544968/dmca.html
    • http://cmcgpartners.com/uploads/1/3/0/5/130544968/policy.html
    • https://xemodege.files.wordpress.com/2020/06/71761182277.pdf
    • https://mafowuz351854288.files.wordpress.com/2020/06/33180766998.pdf
    • https://vijunujupo.files.wordpress.com/2020/06/53001596821.pdf
    • https://zatikawiji973794956.files.wordpress.com/2020/06/310713795.pdf
    • https://vobenixabew.files.wordpress.com/2020/06/94827157778.pdf
    • https://zavomepe.files.wordpress.com/2020/06/83467580122.pdf
    • https://xefaxufo.files.wordpress.com/2020/06/bunerebixosovusivoxulub.pdf
    • https://babesakaj.files.wordpress.com/2020/06/6671608696.pdf
    • https://faletulaleb.files.wordpress.com/2020/06/pifodap.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fc4.bin
a1c68180eae955d710b1f59d89b7b5bb1f22246194deffa7b9c3298859733f9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC4 2140 bytes
font_01_sfnt_off0000699b.bin
93c828bd8fd3ad87ba67e8c466bf15959a3160ec98117632e98e7a051496e96e
pdf-font-stream PDF embedded font (sfnt) at offset 0x699B 10840 bytes
font_02_sfnt_off00008ea3.bin
e56f5db8faf554166087922806b3819c377976d94af14c6b8a512386de68c265
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA3 2056 bytes