Malicious PDF — malware analysis report

Static analysis result for SHA-256 9786b90a0a43e3d3…

MALICIOUS

PDF

69.5 KB Created: 2021-09-29 10:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9ee96dcabc664b1c8ed695ed8ecb7fd4 SHA-1: c9f84a18546816484fd191eeafe77debbdf4e935 SHA-256: 9786b90a0a43e3d3e127b2c9e8fa4253bec5c49a7a83646aab0109ecafe022dd
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to domains that appear to be part of a link farm, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic. The ML classifier also flagged the PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external URIs suggests an attempt to redirect the user to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://alteredcompta.com/buddha/ckfinder/userfiles/files/godulexegu.pdf
    • http://irvinenott.co.uk/ckfinder/userfiles/files/53661725232.pdf
    • http://prograsifkalip.com/files/xexowojawi.pdf
    • http://blfimmobiliare.com/userfiles/files/76366537240.pdf
    • https://globalybm.com/ckfinder/userfiles/files/1631432794.pdf
    • http://zentrumok.com/userfile/files/lipemifitetogixibolobod.pdf
    • http://learnersdigest.org/userfiles/file/65472994180.pdf
    • http://www.anaja-inter.org/public/file/90915561738.pdf
    • http://energywork.pl/userfiles/file/23543450390.pdf
    • https://cvsc.co/userfiles/file/96425948770.pdf
    • http://zgkimsteszew.pl/img/upload/files/gusogafebuzuze.pdf
    • http://atdawnwelift.com/userfiles/file/wosebisosupisajelomewaj.pdf
    • http://lapenya.cat/imgjovesnaves/file/41189113369.pdf
    • http://slavutich-media.ru/userfiles/file/fojujepiko.pdf
    • http://sweepinstyle.com/userfiles/file/8302390062.pdf
    • https://stw-nowogard.pl/download/file/23910249794.pdf
    • https://accidentmatters.com/ckfinder/userfiles/files/30439061833.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161410d9b20bc2---2802173605.pdf
    • https://sonntag-immobilien.lu/userfiles/files/rusomilabimatosoj.pdf
    • https://deitratech.com/userfiles/file/kimepumokire.pdf
    • http://pietroquatriniarchitetto.eu/userfiles/files/4277741288.pdf
    • http://hai-bi.com/uploads/files/202109060013213414.pdf
    • https://salonrewards.ca/images/file/74098001007.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=read+nancy+drew+online+free
    • 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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aeb1.bin
3c88687cc764ed74b047ae73933e3e0261b5d074628912e0197271f8120d9e33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB1 16440 bytes
font_01_sfnt_off0000d8aa.bin
66cf14d6daf871f19686625eb3568ed6d3bd258b34d0eadd78b15c072096bdb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AA 10448 bytes
font_02_sfnt_off0000f079.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF079 16792 bytes

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