Malicious PDF — malware analysis report

Static analysis result for SHA-256 f462d6952f63b4a2…

MALICIOUS

PDF

90.8 KB Created: 2021-07-27 19:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: e16d94d9ce70441b663e1c486970994d SHA-1: 9c8f479c7b59248fe2635f5bb9f5185fcbd1b174 SHA-256: f462d6952f63b4a2be081fccd493556bbb2ca6e56ab9e36bec3199505f4fe3ef
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of ClamAV detection and ML flagging strongly suggests malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://biatlonbreza.sk/editorfiles/files/jelilugiwadaropun.pdf In PDF document text
    • https://bestrecycledautoparts.net/images_i/file/rukedilewuxizopexukexuwi.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/dozika.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/1b731f79ad938e59abfbe1489c00fec9/likunizakesomoj.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd358d7c0a---xegafefibo.pdfIn PDF document text
    • http://hhcreunion.com/clients/4/43/43f38dc94a4d709fe78decf5bd9d7370/File/6682448532.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/afc66774d90302fb8b3323cc6178c11c/melisalatobako.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/ropawabogomuxet.pdfIn PDF document text
    • http://dhf-china.com/d/files/xumegig.pdfIn PDF document text
    • https://eminesenlikoglu.org/resimler/files/kivejaduwobasowivubob.pdfIn PDF document text
    • http://gwtcs.org/Content/uploads/files/65016177979.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/sepasuzafotijazukenutedes.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609861ea35a15---guxaxuxu.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd064e9bb8a---ninetunatajitotadeg.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cac06c67436---22879407895.pdfIn PDF document text
    • http://bmcsteel.com/uploads/baiviet/files/54770846433.pdfIn PDF document text
    • http://perechen-jurnalov.ru/js/ckfinder/userfiles/files/toxifizekemez.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e6aae6640---jeboguvuzo.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/73227282634.pdfIn PDF document text
    • http://tanphatinst.com/vietkiendo/upload/file/purowuwefivovezitoziw.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/5sqt50foaep3sumc4ukvro5ohm/43562503165.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/f067ff2b777735fac53c36752efe2226/7744987557.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210530_9D8FEB68CC89BEB6.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a456787da70---22654133874.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/e59abd690bf4ebf8ca8b035e3cbd827c/xurixini.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=sharp+2t-c40bg3kg2fb+40+inch+full+hd+led+smart+tvPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF899 17804 bytes
SHA-256: 32e0363d68fd01d7871a9e0cf93e1bcfd0806538b775ae0c6cbbe52e1881d6a1
font_01_sfnt_off00012799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12799 11944 bytes
SHA-256: 56515f0aef23690988f3736d8690dbcb8cc58b2793bda593883fcfd922b00a96
font_02_sfnt_off000143da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.