Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd9c1bdbc40f10e…

MALICIOUS

PDF

71.1 KB Created: 2021-10-02 14:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-26
MD5: 39ef0d07cbc8768a3e76ddb668f6d858 SHA-1: c872b63b5e1ebe32071673cb9e9cab8e36957f80 SHA-256: 3dd9c1bdbc40f10e62e3f3faf14c9aed6e79a082f50a4b6c9754d516635b9271
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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 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://synerhu.ru/uplcv?utm_term=k+lines+x+ray PDF link annotation
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145219694626---28711976944.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/kogilokesaxibifulos.pdfIn PDF document text
    • http://pro-customer.de/userfiles/file/88121856406.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/losakizabafedonikubeme.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/juvemi.pdfIn PDF document text
    • http://aftp.bg/userfiles/file/tusenid.pdfIn PDF document text
    • http://annabarons.lv/files/files/wisulemobodejewabu.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/1948108681.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/fce9eb275d7a271fa3d07641f2861ec4/25815514662.pdfIn PDF document text
    • http://metabolizmusonline.hu/images/upload/file/3120856974.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/zobazuwan.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/56329765175.pdfIn PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/23019397924.pdfIn PDF document text
    • http://tatnhapkhau.com/ckfinder/userfiles/files/kiribav.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/76133218539.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/turoti.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/58975187978.pdfIn PDF document text
    • http://kdwatch.net/upload/files/2021091212173129.pdfIn PDF document text
    • https://brod-plovdiv.com/images/muvisavurofo.pdfIn PDF document text
    • https://www.savininkai.lt/ckfinder/userfiles/files/togimuverozilogow.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/xufanerizuwajadoxuwoneduk.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/867e725c235d0c4075ab5dcaff7a9976/sibogupawis.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210905055653.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ed856e89a---xinimisokofewoxagupusijar.pdfIn PDF document text
    • https://harom.ro/files/file/23110533917.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/dazejumeju.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/75312768693.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_off0000b441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB441 10092 bytes
SHA-256: 33b0ba10760b51bae30fb7102e45f0902fb18b3e24efa9a57bdf722b9e242096
font_01_sfnt_off0000cad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E7 17280 bytes
SHA-256: fac4032ec19f7a5328fe321d10dae9056779200990b97c3bf25a631c7ee85bef