Malicious PDF — malware analysis report

Static analysis result for SHA-256 de29183e96d15d3a…

MALICIOUS

PDF

74.8 KB Created: 2021-08-07 05:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7361f5c6107182a98136eba8c7e2132a SHA-1: a11a1938c2187e7dca230de3a45953cb7a0f5c18 SHA-256: de29183e96d15d3a5275aba73ab3cd8a97a3427f5017a30f308ea2f53b57212c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links likely lead to phishing pages or further malware downloads, exploiting users by presenting them with seemingly legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8414

Heuristics 5

  • 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
  • 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://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/hdiigrrg4eal79ulhshupl80v7/8122572518.pdf In PDF document text
    • http://davcpundri.com/css/file/mopapenaz.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/96080546086.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee17063d7cc---jegewigedetujamumizumeneg.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/zizafojatogufojumiwivenex.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/c1rant23aspbs3kt4getjsgikr/50419098867.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/f3928cf030a5f4a540078b424e7b054f/gupexogofoxatupovi.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/86991372985.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/nr8lup5a86s41d6qskq50bj46s/lexanivelumexerovetifiwo.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be0d1b6423f---sapexodagidebazodowamu.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/82593429698.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/zesati.pdfIn PDF document text
    • http://pahsclassof2005.com/clients/d/d6/d61c4c031b0f3af13d3e88110ef3a3e1/File/gogobaweviron.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/ae642d23546bc1476745cf5c2658463a/pekawemudubofezejosagil.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/f8e28980b72181fd53d32e183acc93ed/48821054857.pdfIn PDF document text
    • http://mebco.ru/images/file/64385180531.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/kopabufavewibipeparajavik.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/61400767395.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/84322897349.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/b75733729167979b33f484f9d21f93e6/jizal.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/nripb5cpsmfq1lgrq7i4uugq14/wosepozulisi.pdfIn PDF document text
    • https://airbays.com/userfiles/file/80963620796.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606f33734cb33---zelidomifepif.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/fuxegunu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=free+printable+bubble+answer+sheetsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF120 10532 bytes
SHA-256: 91b917633764d6b3cd6e7c0edaf985f04fadc8136c2823d08e371e15882901f4