Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca4cda389c03d15…

MALICIOUS

PDF

94.6 KB Created: 2021-06-30 15:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d6d62c02da4ff9060f8205cc62904e94 SHA-1: fe02ae9d5b7b495849ab1bc25c3d7935c1614804 SHA-256: cca4cda389c03d150dcd70975464f79846ce473489f0be50dcde7976f40b23ce
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 distribute further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or download of malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9491

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 http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cc8bddd28d9---lebutigimowatemipope.pdf
    • http://nakatka.com/files/file/vapuzorag.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f63eb2ec44---pofutozalivamilud.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804b7026c6b---duzitudadorofotapuzal.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608408bbb2c53---dituxobevevibekanalolo.pdf
    • https://actorconseil.com/files/file/febaxujixonutal.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d694ab6ddf---zipot.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16095c431b6751---lejeguxedifeganobosepesir.pdf
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/85541943125.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607381f2cd968---jomipaxapemoxupuniwowaxeb.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/eec152b3ebc40dc7b8a2e7a16532b414/70624122944.pdf
    • https://aslimitada.com/userfiles/file/38205987773.pdf
    • https://kidneystonetreatment.in/userfiles/files/ruzajatale.pdf
    • http://sincaremedicaltour.com/js/upload/bomevomawovusew.pdf
    • http://remobudostol.pl/pliki/88520417645.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/dudafidoti.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/fe017b5a786ade49a259e89fc727634d/73707888404.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/7nc8evsj5pfj9t29bmnq237nj1/xelifepazefuxinemutor.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609498ef1bb3b---72083105368.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/da7b934e2ceddcbca419b8fe35d9dca5/mikijege.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/4e83c152c71b63239af1065a268f09c2/mawatifadiwudokizudobu.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792a9f7cc2d.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb40c7f647---xinutisus.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/4sbg1gm0kiusnsod4kn43nth52/737743099.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/3744c67d1d272249c413aa78388bfab8/vufuropuxozurexojonomud.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/gniqu03rf5eg90eo43f89em07f/76262469150.pdf
    • http://ottotech.center/userfiles/file/68796836667.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=space+shooter+android+1
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ed.bin
ec79a8d62e05913d517b976688bd40e645812c992a13edde2561dc43d1bbe5a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0ED 17172 bytes
font_01_sfnt_off00011e2c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2C 16792 bytes
font_02_sfnt_off00013643.bin
dcc9f682b1e5cf609a26b4a1dcba1b97bfe03c59dd47dcace3ebcb8137a21d92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13643 10692 bytes
font_03_sfnt_off00014ebe.bin
9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14EBE 16092 bytes
font_04_sfnt_off000163fa.bin
6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x163FA 1692 bytes

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