Malicious PDF — malware analysis report

Static analysis result for SHA-256 4257e2a40eb23b79…

MALICIOUS

PDF

79.9 KB Created: 2022-04-07 20:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: 1b4b5db8289a3f0f14d3b2fbb7701ede SHA-1: 54543bef56863b586e6dbf41932b2db9298a2225 SHA-256: 4257e2a40eb23b79c33d0a36f84dca8847f912ab29add1c344557070f500da97
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ragaz.co.za/YmrXLWy8?keyword=how%20to%20determine%20molecular%20structure%20from%20nmr PDF link annotation
    • https://vakebolabuwumi.weebly.com/uploads/1/4/1/3/141332481/246534.pdfIn PDF document text
    • https://nejotadig.weebly.com/uploads/1/3/1/1/131164569/kakatinuzife.pdfIn PDF document text
    • http://raiz.jp/kcfinder/upload/files/misuwubinepom.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/favixovamopuvotofuganof.pdfIn PDF document text
    • https://lutenowunag.weebly.com/uploads/1/3/4/6/134627800/2081098.pdfIn PDF document text
    • https://sebimifovuduga.weebly.com/uploads/1/3/5/2/135298708/4700794.pdfIn PDF document text
    • https://zugavalomiseba.weebly.com/uploads/1/3/6/0/136082075/vutije.pdfIn PDF document text
    • http://elt-tm.uz/kcfinder/upload/files/lusovifiwin.pdfIn PDF document text
    • https://xonutadeb.weebly.com/uploads/1/3/0/7/130775355/lufitowafexakimipi.pdfIn PDF document text
    • https://fuvewoziju.weebly.com/uploads/1/3/4/8/134883365/1576185.pdfIn PDF document text
    • https://tufanemoxidubux.weebly.com/uploads/1/3/4/3/134315727/kakorovewejoj.pdfIn PDF document text
    • https://lezexogevapet.weebly.com/uploads/1/3/4/6/134657250/depanoju.pdfIn PDF document text
    • https://zoparidozuxeb.weebly.com/uploads/1/3/5/3/135390671/ed710ced760491b.pdfIn PDF document text
    • http://graczeonline.pl/userfiles/file/buzifiru.pdfIn PDF document text
    • http://wtmongolia.com/materials/file/28836300794.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1624af06b5207f---59989133712.pdfIn PDF document text
    • https://sifukimoja.weebly.com/uploads/1/3/4/3/134357082/8149596.pdfIn PDF document text
    • https://zoxawilasewowi.weebly.com/uploads/1/3/0/9/130969521/feperobubajox.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/mudizekibuxufuxev.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/rokadama.pdfIn PDF document text
    • http://ozanatalan.com/iboard/includes/userfiles/files/2681617002.pdfIn PDF document text
    • http://saraco.kz/public/uploads/files/57851137419.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_off0000d309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD309 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB20 10816 bytes
SHA-256: 9bcc16db9a005efffa5c98b046636e305934ba39324b4ba0de54196cc172ef3c
font_02_sfnt_off0001040c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040C 17192 bytes
SHA-256: df32bc55c75b24919a12ffe9be02d11ca58c24229a6f44684c4da0b4f667cdaf

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