Malicious PDF — malware analysis report

Static analysis result for SHA-256 06df2cbd7f2dd29c…

MALICIOUS

PDF

82.9 KB Created: 2021-09-11 16:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 27513aff49b5d179acae00263838e797 SHA-1: 6652292674ef2d898ad139e92aec01219dd8452f SHA-256: 06df2cbd7f2dd29c4daec36f543aa2b0d33910561d4f81803213aba6254d4620
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are part of link farms hosted on potentially compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/uplcv?utm_term=pokemon+go+joystick+pc
    • http://stylekd.ru/files/milujavureregupe.pdf
    • http://www.udelimpa.es/ckfinder/userfiles/files/91892875378.pdf
    • http://k1a.ru/images/files/file/65758812225.pdf
    • https://urbanshapes.in/userfiles/file/jakigenax.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/26280610a65dc15f11e5fadbfecca834/zegojazorarizutikagesona.pdf
    • http://ottomaniantextile.com/userfiles/file/sabiwanexusive.pdf
    • https://elmawadah.com/userfiles/file/87954357635.pdf
    • http://5m-tti.com/uploads/image/files/ruvufunotogejaxewipip.pdf
    • http://gaestehaus-am-erlkoenig.de/img/editor/file/96476395948.pdf
    • https://ctcitsupport.com/media/files/dutojafadenakakezer.pdf
    • http://jjmcp.jp/userfiles/Image/file/34078879100.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/04c8h413ec0hp0oo7p6cl7jef9/95827879116.pdf
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/97475593815.pdf
    • http://skipjackpoke.com/ckfinder/userfiles/files/64021147634.pdf
    • http://allier-genealogie.org/File:/labokixopolixesoruronaduz.pdf
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/divinugakibuximebimonox.pdf
    • https://projekt-lesen.de/userfiles/file/35173999129.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b207bb8b0a---zefojudozapiperikid.pdf
    • http://elpijisystem.com/file/37184324284.pdf
    • https://dondepodemosir.com/userfiles/file/fomixakum.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161305eb4f27fa---48195657510.pdf
    • http://nepodoshlo.kz/ckfinder/userfiles/files/58338481283.pdf
    • https://responsible-tourism-alliance.com/content_file/files/gafawirebixarapedudaj.pdf
    • http://mtt-association.fr/upload/file/nogasowisesogizamuve.pdf
    • http://files.ibiza-ferien.de/file/vezekafu.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/
    • 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_off0000ddef.bin
23241ccbab05daf73c659ed7ca06fb330c5f77659bf2d0712bf00737bc8eb222
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEF 17960 bytes
font_01_sfnt_off00010cf2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF2 16792 bytes
font_02_sfnt_off00012509.bin
423b8a27c030535de49cb6056b9fa3c532d415148d939bc55b0043a16e2d0214
pdf-font-stream PDF embedded font (sfnt) at offset 0x12509 10748 bytes