Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30c5f3b0b391745…

MALICIOUS

PDF

43.4 KB Created: 2020-04-03 04:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0c8941a97b4be5c9a1a9267fe066c140 SHA-1: 42d09189afb5b36c0590e4f6066a59de10ff9fe6 SHA-256: c30c5f3b0b3917457b9d29388498b97c62e20ee439ae9c307cf2e2cf389caa09
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or SEO abuse tactic. The ML classifier strongly flagged this PDF as malicious. The document body contains what appears to be junk data and a few URLs, but the primary malicious activity is the mass of external links.

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://foxcreekgarlic.com/uploads/1/3/0/4/130435670/130435670.html#toro+ultra+blower+vac+51609+manual
    • http://cindycavallaro.com/uploads/1/3/1/3/131379567/zebeposumaxob_gaputowe_mulujuse.pdf
    • http://webnock.info/uploads/1/3/1/4/131438299/xudaxidetunote.pdf
    • http://challengedhouses.com/uploads/1/3/0/5/130547689/dawaduzimefexefiwo.pdf
    • http://www.midwalesgolfcentre.co.uk/uploads/1/3/0/6/130620797/353698b906fb9e.pdf
    • http://clausogkramer.dk/uploads/1/3/0/5/130588731/7572077.pdf
    • http://manorcasa.com/uploads/1/3/0/8/130874679/3150157.pdf
    • http://workplayplan.com/uploads/1/3/0/6/130604529/jofobelawetalus-giwujama.pdf
    • http://otherworldlyart.com/uploads/1/3/0/6/130639230/funivodezuwo-lobul-xanupoge-logagogovaragag.pdf
    • http://fiveofive.shop/uploads/1/3/0/7/130775690/duxigig_navoroj.pdf
    • http://apple-techsaz.net/uploads/1/3/0/8/130813458/cc573fcb.pdf
    • http://lilkerisace.com/uploads/1/3/0/4/130483230/8387173.pdf
    • http://crazyspeedracing.com/uploads/1/3/1/3/131380930/wodisoweji.pdf
    • http://katherinethomasart.com/uploads/1/3/0/2/130289748/29544c2f300b1.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_off00006bea.bin
134e129451947b6f4e38eeb8889d546a656ebdce7cf940c776546eb469882023		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEA 7680 bytes
font_01_sfnt_off0000898b.bin
25137f50402a292334e8f381624ebec25a0645415b62794b4490193aa7ec095a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x898B 16120 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.