Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae30090c53922275…

MALICIOUS

PDF

72.5 KB Created: 2021-09-28 00:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0454652157ec4f4f910f1ac7842013aa SHA-1: 591684ba6882842d4fc6c3b00a4e6490516849d0 SHA-256: ae30090c53922275c1bf3bcf7bf151c7a3242f9602d24dc327a45b2a042bf433
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous external URIs and link farm heuristics, suggesting it's designed to redirect users to potentially malicious or phishing websites. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://garglob.ru/uplcv?utm_term=slugterra+slug+it+out+2+apk+hack
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614e1316bf0f7---72524866940.pdf
    • http://atem.sciara.eu/public/upload/file/vupuwenoragaz.pdf
    • http://msslink.ru/userfiles/files/97633511642.pdf
    • https://chilegastronomia.cl/uploads/userfiles/files/nutopuwodanuweduxabi.pdf
    • https://ctners.com/ckfinder/userfiles/files/18811468160.pdf
    • https://office-agglo-larochelle.fr/userfiles/file/50872910618.pdf
    • http://zabradli-znerezu.cz/userfiles/file/marobafovujeradevow.pdf
    • http://world-green-hope.com/uploads/files/27640901617.pdf
    • http://chunmianxian.com/upfolder/e/files/20210914101554.pdf
    • http://deleeuwputten.nl/site/data/ws/files/88993072670.pdf
    • http://misterholidaysanprisco.it/userfiles/files/96621242879.pdf
    • http://fs-select.com/images/blog/file/45743188166.pdf
    • http://taiwan-casters.com/userfiles/file/tuxotogapurajavabimux.pdf
    • http://italianopizzeria-pg.com/uploads/files/lagojojupuxixegetosuwol.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/a8b758c5efaa865d98d8762edb77d36e/33526541885.pdf
    • https://booking-news.hkdnracing.com/webroot/editor-uploads/files/puripivapivewis.pdf
    • https://kaptenhoki.org/contents/files/wuzusole.pdf
    • http://nadiadsa.org/userfiles/file/86515832661.pdf
    • http://logicamail.it/draft/media/mufaganiwuraguxuvoro.pdf
    • http://mevlanaasm.com/resimler/files/80533199847.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1614e70ff42a10---78659605572.pdf
    • http://clingac.com/d/files/gedugobefosugoxegegew.pdf
    • https://shiokuda2.com/contents/files/zerimidixa.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614b8d5fb8f81---waxenuvekedefogen.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161362975b41f9---lakukonupeb.pdf
    • http://onlinetradeshow.ir/uploads/files/vavolovejonamefijaluli.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615232efde9c1---60573304434.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/80f62736b8a256ec354896cb47b9168e/90593967452.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_off0000b6b3.bin
5004c8db12c6b6cf1e4019a447bfaea6f93fd5e2c82c8b81e968b4298c26ebe8
pdf-font-stream PDF embedded font (sfnt) at offset 0xB6B3 10936 bytes
font_01_sfnt_off0000d03d.bin
12c34102c33bd69667748d2ac1ccd820325a7c9f837886bde83efd120f347391
pdf-font-stream PDF embedded font (sfnt) at offset 0xD03D 17088 bytes
font_02_sfnt_off0000fc1a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1A 16792 bytes