Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f9702ae79fd9cf…

MALICIOUS

PDF

78.8 KB Created: 2021-09-16 13:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 2cb50ae1289d7ea600d41eb1c25e9778 SHA-1: bf028b071a3bf1f0d50d6c37dabf965fb5fd1c42 SHA-256: 00f9702ae79fd9cffe3c609de15a890d00680cbb93ab3c551861b7f7613524b5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF viewers and delivering malicious content. The presence of numerous external URIs, many pointing to disposable domains, strongly suggests a phishing or link-farming operation. The ML classifier and ClamAV detection further confirm its malicious nature, likely as a phishing lure or a downloader for further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://krisoc.ru/uplcv?utm_term=mejorar+recepcion+wifi+android PDF link annotation
    • http://kancelaria-perfect.pl/app/webroot/media/files/80845837286.pdfIn PDF document text
    • http://dentalweek.eu/userfiles/files/kibalunu.pdfIn PDF document text
    • http://fitviewer.com/files/file/fatakuviloxifujaxo.pdfIn PDF document text
    • http://studiodrago.eu/userfiles/files/juxunul.pdfIn PDF document text
    • http://kencert.vn/uploads/image/files/21725712949.pdfIn PDF document text
    • http://ty6600.com/userfiles/file/75114143087.pdfIn PDF document text
    • https://la-klamm.org/Files/files/ratapuguw.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/66188485556.pdfIn PDF document text
    • http://adec-interiors.net/Uploads/file/kujij.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/dadip.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/suvozefuwo.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/jekelunarifasuxazenofam.pdfIn PDF document text
    • http://gitishahjahanpur.org/ckfinder/userfiles/files/lijevujebalovokubaz.pdfIn PDF document text
    • http://tehpromyar.ru/media/file/62396806360.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16142a39a51eb4---66496367855.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210904_AE114A9711A1B396.pdfIn PDF document text
    • http://finadev-groupe.com/userfiles/file/19758283773.pdfIn PDF document text
    • https://tpijobportal.com/ckeditor/ckfinder/userfiles/files/rarujirinuguvi.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/puluxajobuwume.pdfIn PDF document text
    • https://bipalisdemo.dashindonesia.com/userfiles/files/laxapubazazupobix.pdfIn PDF document text
    • http://www.msjcongregation.org/www/js/ckfinder/userfiles/files/18032956807.pdfIn PDF document text
    • http://coytex.net/ckfinder/userfiles/files/mexavikunibanizowuzubo.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/32597088608.pdfIn PDF document text
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/15925185574.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD302 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB14 16756 bytes
SHA-256: 2af7f80f883bb48e2a12989fc408da026fab62f7288a8ecec966eb8b7fdd6d0c
font_02_sfnt_off0001158b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158B 10508 bytes
SHA-256: cc31f81dd4813b9e85b586039ad25f6ba09139b6e090cb4bcd87fd519c4197ad

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