Malicious PDF — malware analysis report

Static analysis result for SHA-256 815f6b77daceb4e7…

MALICIOUS

PDF

103.7 KB Created: 2021-07-05 13:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 726a1ff8f8904d505d2d68dc46ff0252 SHA-1: dac7d9ebcb5fa01e194495a801ce739a9b7147b6 SHA-256: 815f6b77daceb4e7c7d8e423c90e2f1c10283569c204668e2a4299acf0587e18
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The presence of these links suggests an attempt to lure users to external sites, likely for phishing or to download further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3637

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://ketchas.ru/uplcv?utm_term=the+state+adopted+decentralization PDF link annotation
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608022d440187---gogilif.pdfIn PDF document text
    • https://izr.fr/files/82832447555.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/ridomenakoraru.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/64374722244.pdfIn PDF document text
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/950f8270341bf239b4cae4d4fcdc254a/42767437447.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/982d6b5a51a0fd0c773c002bf3094c10/19026704849.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/ir5o3qb86q6lrnbfggn9sbh9ta/rivubef.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/62598055939.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/8516158980.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160816c6291ea6---webavexem.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b1541de18---72609459419.pdfIn PDF document text
    • https://epiphanych.com/images/file/91716361060.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c048a1ac09f---xiludopelejufin.pdfIn PDF document text
    • http://prosquash.by/data/21868961827.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b09e4a1d7---30829623618.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/0544c06ca9c4d1474616e410a675d9f8/masozobatikisag.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/ek8fgmle84t2cvi71h92nlkvk5/sogejimunawabulodigo.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/33304891439.pdfIn PDF document text
    • https://kede.org/userfiles/file/sotijawonadixuzolarojav.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b74695ebd---108739575.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/nebexojogudulizisugowuxiw.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/25040462720.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4636dfad4---pewufe.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/pokinagujonikali.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/doligivusibinotafexozuduj.pdfIn PDF document text

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