Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f15b9fc64b55433…

MALICIOUS

PDF

40.3 KB Created: 2020-03-10 03:02:04 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e3d3e33471f7b840c8d47e5003792803 SHA-1: 5efc63e76b490d8fe18accb6a9b42d4af311a3aa SHA-256: 7f15b9fc64b554336eb193465d7a43b6d32794bb9659499164fc681aadfc7819
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the embedded URLs are the primary indicators of malicious intent, likely serving as a lure to phishing or malware distribution sites.

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://host243.carmichaelnl.com/uploads/1/3/0/6/130604892/130604892.html#perfect+tenses+exercises+english+grammar
    • http://www.djournalebydn.com/uploads/1/3/0/5/130590477/df73a208.pdf
    • http://keynoteadmin.net/uploads/1/3/0/7/130776072/8056663.pdf
    • http://mx.calmumcubs.org/uploads/1/3/0/7/130738909/4092019.pdf
    • http://covernpages.com/uploads/1/3/0/6/130620441/ac5609ffc.pdf
    • http://iwannapc.com/uploads/1/3/0/5/130544754/a1c5cd2.pdf
    • http://youarethevariable.com/uploads/1/3/0/4/130476619/2952720.pdf
    • http://sacvalleypettingzoo.com/uploads/1/3/0/5/130551230/diragumukepexeviro.pdf
    • http://hostmaster.cryolipolysedenhaag.nl/uploads/1/3/0/7/130738911/gagewopezi-guxita.pdf
    • http://theparksphysie.com/uploads/1/3/0/6/130621354/9102448.pdf
    • http://www.atwistedbrunch.co.uk/uploads/1/3/0/9/130969209/2736078.pdf
    • http://www.sharkbaydivecenter.com/uploads/1/3/0/5/130542922/ratopifezip-xejaz-bunamiz.pdf
    • http://elementecommerce.com/uploads/1/3/0/8/130874001/e62e94b3b295.pdf
    • http://rockymountainracquet.com/uploads/1/3/0/6/130620694/2954031.pdf
    • http://martayogahome.com/uploads/1/3/0/4/130477448/403a6e638.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_off000075c2.bin
82890b6fceae8589fcf07b8a322d5efbb7fd92ab8c424b84aa9786b61b990a09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C2 7748 bytes

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