Malicious PDF — malware analysis report

Static analysis result for SHA-256 efd32dc5dff6de59…

MALICIOUS

PDF

102.1 KB Created: 2021-06-29 12:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f617f83a6348bb0b90ce2432ae83427d SHA-1: ee1af35b75b3ead0a2a2c8903281450ae8122b4a SHA-256: efd32dc5dff6de59b9b4c44ad378e8b2d9067bd50ed7d245e416b68dd0e007b8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm pointing to numerous compromised WordPress sites and other domains, suggesting an attempt to distribute malicious content or redirect users to phishing pages. The presence of external URIs and link farms strongly suggests the document's primary purpose is to lead users to malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5198

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://wastran.ru/uplcv?utm_term=polity+mind+map+by+abhijit+rathod PDF link annotation
    • http://kpotplace.com/uploads/files/71602975614.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/latem.pdfIn PDF document text
    • http://apartamentosalbatros.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d52c89c2ac---22928780951.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608141b981ce6---97901749720.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/ae873198158bf4b6675adb9a11cfffac/38858041241.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b242ee51c---vedosexi.pdfIn PDF document text
    • https://x-software.cz/data/file/18080674891.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/24498505386.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdc152e6c2---viteloxuzep.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/86jav1gce8buofibqbmv5ujm1t/78562182856.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/7e0963375cd69d0b92fdb3d6bdf66c1c/36373155058.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b86bcaede2c---34743968208.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/nedewowituru.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ebc4663eb---beropatitopumevuwifoj.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/363aab7512500154667daeeb3e14734a/mutititaraturerimile.pdfIn PDF document text
    • https://stopserv.ru/files/file/lorura.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0e332824d---76620668121.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/7c2916c74f6b2b3cd6b09d482d3ea5f7/wowonakejezijirotufuz.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/kixudagewasegaguvesosu.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/wuwozopigatomubewibi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609891055387f---xanunobipubuwivikuj.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/baljj83kpu2t0u0cm3hs04mjb0/41001810793.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097001b80bb1---53690895466.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/2f20cadf794c868d8861e66c2119e8bd/43034832509.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/2ea6e2adaec34d87c0b0aea9ed9a4a42/77699103977.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/tixokarosotofe.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000169e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000181f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181F7 10740 bytes
SHA-256: f5beea5152ce6af467dc4a59cd0168952fafbaf4240fca4e7ac7aa3e2c03f8ca