Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca640f0ff187276e…

MALICIOUS

PDF

72.5 KB Created: 2021-10-26 10:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-07
MD5: c9931fe378711f4356edd640dc9ba007 SHA-1: 7a69cd1b95305fe5b34001862a04148cb3ab9632 SHA-256: ca640f0ff187276e1c01662aa42c5224f2a02f743f746c84cfad13bf0a640afa
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://allytemp.ru/uplcv?utm_term=what+we+do+in+the+shadows+season+1+123movies In PDF document text
    • https://imagebrandstudio.com/userfiles/file/japisazakajevuka.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/deburefivojed.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/jufekajarukelasov.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/95503694774.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/17413159239.pdfIn PDF document text
    • http://explosivedevices.ru/media/file/zorotemosalu.pdfIn PDF document text
    • http://lucchetta.net/userfiles/files/64797574758.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/zerojijinelojalopesufog.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/resexavinotaxufefajul.pdfIn PDF document text
    • http://archiwalna.slezanie.eu/userfiles/file/xuxaduwadonutotigezofiz.pdfIn PDF document text
    • https://spandoekland.nl/userfiles/file/mutetokukimo.pdfIn PDF document text
    • http://isdoor.ru/uploads/files/nixafitumowuxi.pdfIn PDF document text
    • https://icoachyou.biz/images/ckeditor/files/xokinijazivoz.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/56258612594.pdfIn PDF document text
    • https://satbietthu.com/luutru/files/66829860180.pdfIn PDF document text
    • https://www.zochrot.org/ckfinder/userfiles/files/patibaganulosopo.pdfIn PDF document text
    • http://dzerzhinsk.timebank.ru/sites/default/files/photos/pagefile/bofixelukaziwimox.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/161379eb66024a---wawavodimezixuja.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612ecc87794df---fedelubonumim.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/4d85055af3811b854fecab28e97c2718/16672272018.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/xofudederijijowu.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/lawixese.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 extracted file (font_00_sfnt_off0000b53a.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000b53a.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b53a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB53A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4C 17140 bytes
SHA-256: bcc0cf5730c737b2f648eb4df081018cb0566248e6dc7d29834f25dcdd32b004
font_02_sfnt_off0000f9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B2 10856 bytes
SHA-256: 974f40a8ef0e64809290e956349cbed2db9391b15df0ee10cf151cc783cd5920