Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29e7740dd96cfbe…

MALICIOUS

PDF

68.0 KB Created: 2021-09-30 18:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 677eaea04b2cf3f41c15307e156981b4 SHA-1: 454f6cc84e6e224c78eeb717a5b5545f9af26637 SHA-256: d29e7740dd96cfbe011dc359a7d015b057612aae4ac27279dadc9342396d9078
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The presence of these links suggests the document is intended to lure users to external sites, potentially for phishing or to download further malicious content. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://nomylo.ru/uplcv?utm_term=opera+android+emulator
    • http://thementalhealthadvocates.org/files/userfiles/file/sozovuzanet.pdf
    • http://4bx.pl/public/file/11218655670.pdf
    • http://abwnickersonplaza.com/uploads/files/89102682780.pdf
    • https://poganyvolgyi.hu/userfiles/file/41161521822.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613fca222a152---dititaro.pdf
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/29719731894.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f74b26395e---44780747442.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16141f5e75284e---dazugusifu.pdf
    • http://solyaris.pro/admin/ckfinder/userfiles/files/jerajuz.pdf
    • http://www.ks-klinika.ru/ckfinder/userfiles/files/26997824021.pdf
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/72123959716.pdf
    • http://togclick.com/media/userFckfiles/file/62279055942.pdf
    • https://dodomacnosti.net/data/file/weterox.pdf
    • https://suacuacuontoanphat.com/upload/files/mekuvopukazewuxexexir.pdf
    • http://www.kymenhome-etsinta.net/tiedostot/files/67315894133.pdf
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/bolewadijerejefozosami.pdf
    • http://neboskreb-irk.ru/uploads/userfiles/files/wuvatuditezunoradifedug.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/nqlbigtdm2o1gi5ig3f0oik0uo/88608508249.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161519c7a0adad---derotuvunela.pdf
    • https://bloomlight.pl/_bloom/file/34228350893.pdf
    • http://homespakistan.net/magzine/uploadfiles/file/korexekixuxade.pdf
    • https://petandpuppies.com/userfiles/file/rilelisebulupimetur.pdf
    • 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_off0000acc8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xACC8 16792 bytes
font_01_sfnt_off0000c4da.bin
f03899c277838cfae15cadd8bc9c8a429e5e7f118f7e72c27d2d9383fd7bb63a
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DA 15032 bytes
font_02_sfnt_off0000eaec.bin
d35e9c9a9461c08c3b96c3046d4a68860dcfb0181d055bcc7bb74198c770b52b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEC 10508 bytes