Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dccc22958b78c1c…

MALICIOUS

PDF

93.1 KB Created: 2021-09-15 13:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c98a97a33d3d270b55904c1ceae8f873 SHA-1: 284195c92da3e4cd303ed2b17dc0985a585c089c SHA-256: 2dccc22958b78c1c68386dcf33f4335c893582b98b01627e41f9c1cdc40e3734
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of 'utm_term=download' in one URL indicates a lure to download content. While no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest it's designed to facilitate the download of further malicious content, likely via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://queure.ru/uplcv?utm_term=download+battlelands+royale+apk PDF link annotation
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613faba53f6bf---viveweturopememup.pdfIn PDF document text
    • http://telek-trans.hu/editor_up/76806519486.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/98893754809.pdfIn PDF document text
    • https://blokhol.com/upload/files/fosewosumebudagos.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130ad898ef6c---futeluw.pdfIn PDF document text
    • https://kolorubursztynu.kolorubursztynu.pl/web/uploads/files/70312370190.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f400aa1804---89478585206.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/vovix.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/46515636538.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/rimovokigifeju.pdfIn PDF document text
    • http://mestav.sk/uploaded_images/file/dimasid.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/terovugibozivowivut.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/01abb7b1ce40e69c7ddd096d2355a530/kisadubu.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/8393792953.pdfIn PDF document text
    • http://gonganmi.com/userfiles/file/manumivixijarun.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/lotufedogezewiwulatumiz.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/nekurefobemati.pdfIn PDF document text
    • http://betonkeritesek.eu/Content/files/70355637618.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/sodivixopasotoxekobusa.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/36274110992.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/55435110210.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/47790205154.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/163129191611627260152.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16136c0533c762---52158890693.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD8 16736 bytes
SHA-256: 6be8074a93154886e3c39a350d20d5288da40cba473b7c913f112f712f792232
font_01_sfnt_off0000f5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BC 25060 bytes
SHA-256: 61e43ce2bc3ff3663494bb91399cfb15fc2fb60dbe008f93f133b61b223e0b19
font_02_sfnt_off000135da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135DA 10724 bytes
SHA-256: 20a5d3511e2629bfd341a6ce991af568f4cdd366d16857d801928f90d598dea4
font_03_sfnt_off00014e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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