Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f392fd5c4988618…

MALICIOUS

PDF

76.8 KB Created: 2021-06-29 16:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: aebd9ad7ec4ac7ee6d1c71c27a6d1a25 SHA-1: 3abde15cc650b2faca14af7e25012fd6775d797c SHA-256: 8f392fd5c49886183f8be2468e670bc397b03716751809e2a144a5928a070b4e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits vulnerabilities or serves as a phishing lure. The presence of numerous external URIs and link farm heuristics suggests the primary function is to redirect users to potentially harmful websites. No scripts were extracted from this sample, but the overall structure points to a malicious document designed to lead users to compromised or malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://medvor.ru/uplcv?utm_term=under+the+dome+full+movie+free+watch+online PDF link annotation
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/98cfdc42f490bdf30ac9daf202609e3a/23512975478.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16070f329ac470---vipesupurekal.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/72r38k2sre5kgidh5ijclel9la/pegilavopegivilig.pdfIn PDF document text
    • http://garystrike.com/clients/3/30/301ae0ed988f9237e4cb8f8c41f6cb36/File/sutegenasonezarubizavusel.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/negivabojaki.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a008020896f---17212693678.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/7ed42b5685846b6bef295caf912ad730/58230522713.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/7beofbhisjaqlrv8584gir5f0h/vidufapodorotezebada.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/dofomijedubobafefib.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/n239t8ev6naqbm4lp42uf5etba/vejopokebajotog.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/b81f477bcc9a0198b3b9ae3e660aada8/78615507424.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/1ja446dn14qih1dmtft18mhm14/bilijivopuruxerugelajojag.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/97rfq55cdt524v0npskjdct7q0/86704059319.pdfIn PDF document text
    • https://flyags.com/editorResources/file///75100266064.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a80105c45---lowobukakis.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c49997d897---76779521635.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/87256010445.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc5d7e0ddf---98387011481.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/a2ek20iq5e3bkqnkbvkog1ulsg/karatulejameseni.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/ad43a823b1d5e84f4ec593d08d717b5c/10569235728.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/kezujitiva.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ksr4d4k3l7dev2ahjrcoipa3q4/37823063780.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/24343959771.pdfIn PDF document text
    • https://sgcaregiver.org/contents/files/vutexesalaz.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_off0000c8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CA 16852 bytes
SHA-256: aa6ebbbabf5e397fef3dcc6bce7b4567c6b8ac8fa455057079f5766707af8d28
font_02_sfnt_off00010d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D15 10832 bytes
SHA-256: 78187af903db4be2fc9d84b674cd5fb7c70a4de8197ed8b21c92afc922c39cbc

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