Malicious PDF — malware analysis report

Static analysis result for SHA-256 486b60a9fb46ee0c…

MALICIOUS

PDF

88.4 KB Created: 2021-06-26 11:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: bbdb236922f549cb6b14879fb32e821e SHA-1: e0e3817982c127cd57274e9ec4c641c1a934c4f7 SHA-256: 486b60a9fb46ee0ce9ca874bc704ac061d40d2782f18261d7791ef6f0bfa77e6
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with a malicious PDF used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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 https://ketchas.ru/uplcv?utm_term=cool+songs+to+learn+on+guitar PDF link annotation
    • http://jngf.cn/files/file/65407742380.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e1d0e83a0---8115516787.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/xowula.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/gaposigerisevevukisip.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/dozubiwutebeta.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/rrsvegtuqr68h54o4rth3m0kr2/47111181782.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cef7727a1---dutimevubirewaz.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/94645264278.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/23974446602.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/bd03e35993f5646c338ed11eb8154149/4728496683.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/l7mplni708bkh8b6gijaarpra6/zevud.pdfIn PDF document text
    • http://quaker1960.com/clients/3/34/346d0055920ff30d27c63167e405b0e7/File/kijufo.pdfIn PDF document text
    • http://rideco.hu/upload/file/xijemi.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/vakoka.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/dadoronebapegi.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/xokudevisoxivoratevasef.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/d01cc9d4805d1a83417e51a024ca8b3d/83651784603.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774665624a8---felabefovozojerowodav.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/9b72d99f5e054f290a3f2260a4a70c6b/85598584908.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071bdb4583b3---28636546005.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/54755798850.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/tubutubaxijune.pdfIn PDF document text
    • 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_off0000f7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFC 10416 bytes
SHA-256: a175a3ca08d4aa3fd4b7bc40e2703c5d007b8c22b941cd68743516569846fee2
font_02_sfnt_off000127bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BB 17084 bytes
SHA-256: 8821d24a8f802943fb7efb75088463718acbdeaf338dd617c05428c57a2bdf4f

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