Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd762ba5696de0a3…

MALICIOUS

PDF

68.9 KB Created: 2021-09-06 02:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3afc2cb9d59e4ce9de5347437521d3c3 SHA-1: 4a4783aca61789622f076f356ecb6ee59ab8c679 SHA-256: fd762ba5696de0a3559445d0828d294d0cb4b3ba07d621268e8646a7d261508b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9108

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.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba779cee92e---rofepujamozi.pdf In PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f022668a5---95523940071.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/88578150815.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/85192994943.pdfIn PDF document text
    • http://ap116.ru/userfiles/file/revuvel.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/37139806810.pdfIn PDF document text
    • https://jotekonybakterium.hu/userfiles/files/sefudaxatojiwubasusot.pdfIn PDF document text
    • http://triple-a.co.th/ckfinder/userfiles/files/pagiw.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/kidatazuvozosumafop.pdfIn PDF document text
    • https://centrorevisionimonregalese.it/file/xigabujiweremiviga.pdfIn PDF document text
    • https://migger.dk/userimages/file/50806919171.pdfIn PDF document text
    • https://2ruoteexpo.it/ckfinder/userfiles/files/xeduripojopemaxerolobe.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074f7e4c758f---34918937995.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/14ca8569c861f85ffc7ca404cb572b8c/fuzozeluxogujabonafosini.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/kasijofokib.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/c20ca51bc1230611b659d3b4676a93b8/35299575128.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/aofe25o5mdiqi269h2fsiehpll/84617896427.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/1c4bd57e56e873b2828c40f1dae165bd/karadarevapexibinogafetos.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/ff604f19c5d6977ceedda834aba801f0/86417853385.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/b419133df7f85eed5183f754267f3ab3/wetodix.pdfIn PDF document text
    • http://www.valaisconsulting.ch/file/2908709921.pdfIn PDF document text
    • https://castel.ro/userfiles/file/lovadireli.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/48864695142.pdfIn PDF document text
    • http://obraz-tlt.ru/userfiles/file/fonotodiwevaxib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=ecosystem+worksheets+for+4th+gradePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB05 17812 bytes
SHA-256: 383ae3d8914558a43655ab72f14c33fe77a34316fb6ce720831439437a5bcbb3

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