Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6185f4ac08c0096…

MALICIOUS

PDF

294.1 KB Created: 2022-03-12 06:27:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-15
MD5: be1a8e5ec545227adf2130ed9e5e0b5e SHA-1: 3e5cede448aa9a5663344d298063c2c90fab591e SHA-256: b6185f4ac08c009690afb0b550830b9f19192059d806c2269fb23c7cf16dc123
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7105

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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://hkbca.org/UploadFiles/file/20220208075550167.pdf In PDF document text
    • https://robertbah.si/files/file/fazudotilekabakewakalen.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/82587376102.pdfIn PDF document text
    • https://veaodaibrahma.com/uploads/image/files/70653496924.pdfIn PDF document text
    • http://sieuthimaynhapkhau.com/upload/files/70433420707.pdfIn PDF document text
    • http://xn----htbccnijgu6o.xn--p1ai/kcfinder/upload/files/38951242424.pdfIn PDF document text
    • http://do-construction.ch/admin/kcfinder/upload/files/firuga.pdfIn PDF document text
    • http://cadelupo.it/userfiles/files/49912873659.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/falote.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/xukajijafexuwotewo.pdfIn PDF document text
    • https://indianhairtransplant.com/ckfinder/userfiles/files/datulabok.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/29057492972.pdfIn PDF document text
    • http://penzion.sarmo.cz/Images/file/lepowegududigidevudaporav.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/bedewulotumex.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16222e708815c8---85334380526.pdfIn PDF document text
    • http://dominant.name/userfiles/file/90331292713.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/78493437066.pdfIn PDF document text
    • http://csc-027.com/userfiles/file/20220312101328_n76r8l.pdfIn PDF document text
    • https://urudolfa.sk/upload/files/pivegenu.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/68570973004.pdfIn PDF document text
    • http://szamosiszerviz.hu/feltoltott/files/43108235817.pdfIn PDF document text
    • http://venusitos.com/kcfinder/upload/files/xosizedibapurugitalovov.pdfIn PDF document text
    • http://ambulatorioveterinariosanfrancesco.com/userfiles/files/daniretanirikexisosojiz.pdfIn PDF document text
    • https://nvsrolko.org/ckfinder/userfiles/files/34649370932.pdfIn PDF document text
    • http://envigest.cz/upload/file/86137134250.pdfIn PDF document text
    • http://tvsatkrosno.pl/userfiles/file/gavofixaxajesilexurol.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/98388915122.pdfIn PDF document text
    • https://casapenela.cgb.pt/admin/files/files/kemefe.pdfIn PDF document text
    • http://daiichigroup.net/uploads/news_file/zezowomemamex.pdfIn PDF document text
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/xasojalulu.pdfIn PDF document text
    • https://www.officinasapori.com/_admin/kcfinder/upload/files/pokujesujazagijepifu.pdfIn PDF document text
    • https://norin.co.za/XSRYdR1H?utm_term=crystal+report+viewer+asking+for+login+credentialsPDF link annotation
    • 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_off0004261a.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0004261a.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004261a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4261A 18612 bytes
SHA-256: 078945d64691e71f57f942ee822f43967dc29cc0a2129ad430bb53ea5d50d06c
font_01_sfnt_off000456e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x456E5 11184 bytes
SHA-256: 2c085d578695f8ea1bfd4c3118179cadfd671c388f70847739032e9202d7468a
font_02_sfnt_off00047115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47115 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9