Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cbe2f90aa37319b…

MALICIOUS

PDF

85.0 KB Created: 2021-07-01 23:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fd026404a53977d30b11dd261a145966 SHA-1: 4b4dcc066a4e9896b643e5a16203802c95133e97 SHA-256: 9cbe2f90aa37319b9a3c9dfeaaeb6cda155d66c14bb8a0208ae6e910efe8bd8d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites, indicating an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript (T1059.007) is a common technique for exploiting PDF vulnerabilities or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/5b17d844ed45790657876365464c49ab/74109681947.pdf
    • https://purmoradiatoriai.lt/images/files/80332719377.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/3thijuhni8eams8h5r27pb19g3/15126954808.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bee238e69c4---91669818519.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072e33e87924---mirukijijasubokajuxu.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/95b761566e89b130c58ad2af18c6f11a/62128623181.pdf
    • http://www.tekkoo.net/images/library/File/fazefolelisugijasu.pdf
    • http://baugeraeteverleih.de/benutzerdateien/zapibafugazene.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/6gct0gssihkbqfp8i5sbjrlmf2/43199243602.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/0af185ed49ac7d59c7c5b01efea8efb3/47161896572.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/t6torbrgj30lu8mkgmcbbmh1ts/67760483034.pdf
    • http://apartmaji-zunicmile.com/uporabnik/file/mizapeweginakiromotoxu.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075807c48a90---5911137003.pdf
    • http://aep-tc.com/cache/fck_files/file/votajalesubezumupagifegel.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753905e8a17---pukusorukuloleza.pdf
    • https://psychologgia.pl/Upload/file/lokudafamum.pdf
    • https://appchecar.com/ckfinder/userfiles/files/21595241376.pdf
    • https://otartufo.com/ckfinder/tartufofiles/files/81845400545.pdf
    • https://loctra.net/userfiles/file/52174625468.pdf
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/sakirunil.pdf
    • http://kuzfarm.ru/images/file/5999428901.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/b911440dfd283d576d452f5a72b6b536/29539432759.pdf
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16082b17611f2d---golumuminimusewazo.pdf
    • http://blow-w124.com/js/upload/files/73521140133.pdf
    • http://faradbox.pl/files/file/67703238117.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=reconciliation+as+a+service
    • 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_off0000e95f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE95F 16792 bytes
font_01_sfnt_off00010176.bin
7cdadc7883144a95e90da817750b7be72e74fb2a1bf28a4e740168d0223bcfbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10176 10336 bytes
font_02_sfnt_off000118f1.bin
b816b06f9da9ce7527e68776e3d2a31cf03a17debefb9a58b0a0720e87cfa6aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x118F1 17472 bytes