Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c60492563346fdf…

MALICIOUS

PDF

93.1 KB Created: 2021-07-02 11:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 77337ef685ecbaed9e870b237a33c0d1 SHA-1: 42f7eeec144944cb2e9c9655af1ad425c9ce3edb SHA-256: 9c60492563346fdf43652f635a74b3fd86f2724c2c02412454c65682b5dbb96f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. 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 redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/ne1koej0g06ht12d9ro5ggrir1/migikulisufuminirutit.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/iflblc2vridrhpspce6df439ns/97179131236.pdf
    • http://maciejabramowicz.pl/upload/files/file/xigunidaxipizatetar.pdf
    • https://zapret-rf.org/web/img/podborky/files/budokorapurijizusivopez.pdf
    • http://architettoletiziamasciotta.eu/userfiles/files/tulinofabus.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd28b233bf---xatimodugevirezetog.pdf
    • http://amoy-art.com/Upload/file/nawogozonarew.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084dfeb33cd4---81788973840.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a54b0555adb---43572090420.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/918d6dc16ac47f830914e98fc58b6bb0/lavasudizazusajar.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/vdd7c0fmkna1nan2n0bgii8803/49321050804.pdf
    • https://congchungnguyenlieu.com/uploads/files/45166626012.pdf
    • http://alpanelektrik.com/depo/sayfaresim/file/mififevadujusorexi.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/a5d00bf91298aae21a8c92da12a34db8/jofiladan.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754e7f1ea69---83334011594.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f837c2a31---33330197914.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/abe3e20a153040643c22fdc2fc92cb01/19906886331.pdf
    • http://daieimotors.com/js/upload/files/pojewumokigigezukole.pdf
    • https://binarbaidfabrication.com/public_html/userfiles/file/13993720540.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/44f7f48763c8f4fcf4477e383af96747/lisejuzadutewutuzaj.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11da2678aa---kapisefajosa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=buckle+meaning+in+telugu
    • 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_off00010b52.bin
838ed1a9621e9c85b8477939650f5b89ec4352916dacd93673219fa63ffc69fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B52 10432 bytes
font_01_sfnt_off000122f6.bin
753db558a4ef078e61ddc2c3c869d3e717a0d4a9465721b957da9c135eb228ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x122F6 17064 bytes
font_02_sfnt_off00014f7a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F7A 16792 bytes