Malicious PDF — malware analysis report

Static analysis result for SHA-256 32376dc5ec67bc30…

MALICIOUS

PDF

69.2 KB Created: 2021-09-28 15:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7e6430fa2e3640132b8b50c38e556202 SHA-1: e46a281ad2291ed637608fbf0d7631d9ea719550 SHA-256: 32376dc5ec67bc30db4d7156ea4a47b9df4d62766db09cfea3c5629c9e2bcb22
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised CMS uploads or disposable hosting. The 'Image-only document with action trigger' heuristic suggests it's a screenshot lure designed to trick users into clicking. The embedded JavaScript likely facilitates the redirection or execution of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://archism.ru/uplcv?utm_term=123movies+rambo+last+blood PDF link annotation
    • http://webinaris.org/ckfinder/userfiles/publics/files/44480470762.pdfIn PDF document text
    • http://zafirkort.com/uploads/files/80887290749.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/mixogiterenidi.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5325a5420---vimebezogijuxuvoxubuta.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/2446012613.pdfIn PDF document text
    • http://sjhtractor.com/d/files/pokuwuzeduto.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/6eaf56693209ca22e73b7bbc2575768e/78426879933.pdfIn PDF document text
    • http://jjc-dev.com/userfiles/file/61610785525.pdfIn PDF document text
    • https://www.ewdel.cz/ckfinder/userfiles/files/70138808978.pdfIn PDF document text
    • https://gosselindesign.com/images/from_fckeditor/fichiers/81888365299.pdfIn PDF document text
    • http://morecoredesign.com/images/imageUps/files/mujinir.pdfIn PDF document text
    • https://websbag.com/uploads/files/48647411966.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/lomupovalutusa.pdfIn PDF document text
    • https://solturism.ro/images/file/87319466884.pdfIn PDF document text
    • https://12waktu.com/contents/files/xuboraferi.pdfIn PDF document text
    • https://www.iimranchi.ac.in/ckfinder/uploads/userfiles/files/gilukubovinedejirinafoju.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/12518903423.pdfIn PDF document text
    • https://memorybg.net/app/templates/js/ckfinder/userfiles/files/kawejurilapujatewazeri.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2e8f7c324---vuzazepepumumidenipilarix.pdfIn PDF document text
    • http://thebankcardservice.com/uploads/files/12697856290.pdfIn PDF document text
    • http://workontext.ru/media/file/lakoravate.pdfIn PDF document text
    • https://schodyperfekt.pl/user_upload/file/12143224341.pdfIn PDF document text
    • https://perbloland.com/userfiles/file/86265491549.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D8 10756 bytes
SHA-256: fba57df7c8eaef67d99a7771ccff86fb5ae9491aa68f196246fe7ae9e7c9b253
font_02_sfnt_off0000e1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AA 14252 bytes
SHA-256: 208c2c05ab5c08ef210f72c2376ffa342aba381e3d67b0d22561fe3003af3d80

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