Malicious PDF — malware analysis report

Static analysis result for SHA-256 941bc55be663d4f2…

MALICIOUS

PDF

83.7 KB Created: 2021-10-07 19:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: aeda98e8aaa9c65f878a768f9856ef4c SHA-1: fce89ad3d9276ed904ba0fffdce4d6e720788b58 SHA-256: 941bc55be663d4f259cdb8c93d696398a00774e36daf5cff5bf1cc1cc608cd58
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://catamma.ru/uplcv?utm_term=quick+and+easy+resignation+letter PDF link annotation
    • http://clinicaveterinariamontecchia.com/userfiles/files/35864139327.pdfIn PDF document text
    • https://calienglish.com/ckfinder/images_store/files/38277872682.pdfIn PDF document text
    • https://lrdreamteam.com/files/files/file/InfoProduct/file/74854828383.pdfIn PDF document text
    • http://www.siposferenc.hu/html/53104030320.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/xemuwevizujow.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/f47pgei56ed2b3a753tk7eimkl/jisexe.pdfIn PDF document text
    • http://coaching-scolaire.net/userfiles/file/1185391243.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/20494045750.pdfIn PDF document text
    • http://kvrhousing.com/uploads/53855355730.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/51867763264.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615cc13aa7e56---ripekovipiwux.pdfIn PDF document text
    • https://davnosti.ru/upload/14574565972.pdfIn PDF document text
    • http://wedding-ideas.ru/ckfinder/userfiles/files/43435195836.pdfIn PDF document text
    • https://stabiactiv.com/userfiles/file/sazoseronamutokewi.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142489a38112---jijamovokidolarudolujen.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/71683914969.pdfIn PDF document text
    • http://xn--h49al71atridzo.com/userData/board/file/45992236039.pdfIn PDF document text
    • http://carszana.com/image/upload/File/xawageluzutenufat.pdfIn PDF document text
    • http://hutbephottaihaiphong24h.com/upload/files/lenekiji.pdfIn PDF document text
    • http://pachinkoevent.com/sites/default/files/file/27213982691.pdfIn PDF document text
    • http://gr-chem.com/upload/files/lumokifiwaxezapikazeniru.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/rewujaxadase.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614330e1c0ce4---7167875353.pdfIn PDF document text
    • https://bwhe.in/ckfinder/userfiles/files/pogafirab.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/fimuzitofaxeseranetebu.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_off0000ddb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB7 19084 bytes
SHA-256: c00c4cf68531b4fd6de1d05f974a2d1edf896688c027830e3112a4ae5e96a6b7
font_01_sfnt_off00010f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F23 10912 bytes
SHA-256: fc53211475a85b7b053ead22656e9e9c68adf7cf5d888842d09a8b73e9362551
font_02_sfnt_off0001287e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1287E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1