Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f8b7070d92c3028…

MALICIOUS

PDF

53.6 KB Created: 2020-06-27 11:38:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f27c7e15658a041329118ced07e4c77a SHA-1: c4ffb68e4b31a98b7bbb496af799a88ca6d3236a SHA-256: 7f8b7070d92c3028355d16850646a52ebcc6b286c3d6ba9fcd3a57f1d4c2ca5e
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO abuse tactic. The document body, though partially corrupted, mentions 'Toyota hilux vigo repair manual', likely a lure to encourage users to click on the embedded malicious URLs. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous suspicious external links reinforces this assessment.

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://files.cranfordfishstand.com/uploads/1/3/0/6/130604031/130604031.html#toyota+hilux+vigo+repair+manual
    • http://ffdecals.com/uploads/1/3/0/4/130476192/sudob.pdf
    • http://awbphotography.ca/uploads/1/3/1/8/131871993/zejezuxedadofe_gisizifakivo_xovufifujanawet.pdf
    • http://hostmaster.rtscenic.co.uk/uploads/1/3/0/6/130639831/samasokeka.pdf
    • http://mail.hollandskids.org/uploads/1/3/0/5/130542983/dimegine-dimonamej-tudixefilodowu.pdf
    • http://whitestardressage.com/uploads/1/3/1/3/131378779/wufaxeladikepu.pdf
    • http://mail.bruhin.net/uploads/1/3/0/2/130291415/3952905.pdf
    • http://jerrygarciafineart.com/uploads/1/3/0/6/130605156/959e5b9ea4d8195.pdf
    • http://vetskingston.com/uploads/1/3/0/7/130739755/xivulefilowexu.pdf
    • http://outdoormissadventures.com/uploads/1/3/1/3/131383323/ed1ef.pdf
    • http://novel-furniture.in/uploads/1/3/0/6/130604922/71bea3b.pdf
    • https://bemivoz.files.wordpress.com/2020/06/74959472467.pdf
    • https://domasiwol.files.wordpress.com/2020/06/99756121949.pdf
    • https://gomubefibi.files.wordpress.com/2020/06/wumamobavajeburu.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_off00009192.bin
92e22ebf958a94e68321844cb5d9597065e62dc5c4d576106e4f90dfc8b118a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9192 5116 bytes
font_01_sfnt_off0000a2de.bin
c5e150b06ce96837d1ca81f2065896ec0ebb74b6c137376e43edf874c36aa56f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2DE 11940 bytes

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