Malicious PDF — malware analysis report

Static analysis result for SHA-256 f870c953943b4df8…

MALICIOUS

PDF

79.2 KB Created: 2021-09-13 22:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-17
MD5: 6b79341a4d51041e1da215476e8717c7 SHA-1: d9a229cf40bae0300b6e06ca0863bad0c622088b SHA-256: f870c953943b4df85503a533162b98cf24b2da1a695ea001aa511431ed9c4912
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 https://laborke.ru/uplcv?utm_term=best+pdf+audio+reader+for+android PDF link annotation
    • http://arcenevents.nl/site/upload/files/85523640066.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/jesopizudatifajemeve.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/14960968788.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/52177294199.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/18967835264.pdfIn PDF document text
    • https://linlinline.biz/js/ckfinder/userfiles/files/35688028338.pdfIn PDF document text
    • https://baglab.pl/galeria/file/nejaro.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/fewasopesugetukatobomu.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/77279001205.pdfIn PDF document text
    • https://kimcert.com/E/file/nexepu.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/64797056561.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/5519492304.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/59162637326.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/64499067857.pdfIn PDF document text
    • http://www.niceresidence.net/image/upload/File/37097896424.pdfIn PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/poxonujajidifekavizusipor.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/498ec0b4efcc07b0690f691333c075c4/31524881093.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613df6114227c---89406889042.pdfIn PDF document text
    • https://gtijsr.com/userfiles/file/72543375397.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/tezeg.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/jurojewivowinivumazojer.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/gezefuwabibatewumote.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_off0000d0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D8 17668 bytes
SHA-256: f5df6aac514e28ac7302bb12e8e43cc8662dab8c5107eff5d246d95cbe5fd922
font_01_sfnt_off0000fea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BF 10596 bytes
SHA-256: d33149bc3b7290168b8f1869dda950d2585e9960add983cec8b96bb74ea7c548

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