Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b712f31376d5f7…

MALICIOUS

PDF

87.4 KB Created: 2021-06-27 05:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 409561d67fae9f22daafbca978ad1a6f SHA-1: ab7b7bf1202736fe5ab6802d4764571020a71249 SHA-256: 59b712f31376d5f7492d436eb625996b72a4a8a5616ff60a3be8a90db63581d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URI links and link farms on disposable hosting further supports this assessment, likely serving as a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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.
  • 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://drafthe.ru/uplcv?utm_term=today+will+be+hard+quotes
    • http://ixtvs.de/_upload_bilder/_filemanager/file/kunof.pdf
    • https://sheenabusesandcoaches.com/userfiles/file/kunibuwutaweboken.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfffde44f5---papudoterixerodomonubu.pdf
    • http://dioceseofniranam.org/userfiles/file/88757154172.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16089a8e75acb2---21150945258.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc9beac910---85708408001.pdf
    • http://lbtech.kr/upfile/files/panawepavusivef.pdf
    • https://akproauto.net/nbloom/fckuploads/file/lipaweduxemefezametiwaz.pdf
    • http://jullien38.com/ressource/site-image/files/gukegaxogu.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf2cb3bf19---6744545460.pdf
    • https://chungcungoaigiao.net/uploads/files/luguti.pdf
    • http://historia-bfured.hu/userfiles/file/loxiresubute.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/u397j38s2dad32o7n427348a6p/velatavagigomix.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/efdt9c2dhaj1i54m39c36v9l30/nujutezuzexifaxutixa.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8ce5a1f8d---15528478698.pdf
    • http://norilskgu.ru/userfiles/file/diloxoxubufipopune.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/86jak32sbcpdei261h2i5n1fln/23983251786.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3b64c11ce---51005629741.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160abb782bb770---81709350241.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/41hmcp7enu7skl9tqh79d45j36/lozesazuvujafujavagevelo.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/ad9e03766f4e4f132cdef25062819b74/dafefanuzuvob.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5ae1b40bd---58526255866.pdf
    • http://aucoindeshalles.fr/menu/file/28265518081.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_off0000f393.bin
5845431a5c9a7370b8745bca266e8bb71c441fd57862e2ed6b5160d6da4ecd3f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF393 17264 bytes
font_01_sfnt_off00012064.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12064 16792 bytes
font_02_sfnt_off0001387b.bin
6e54a127fe7d1f6935a97436f4ececa4b0def88d6ea0ff6306e7cc47fa788b27
pdf-font-stream PDF embedded font (sfnt) at offset 0x1387B 10792 bytes