Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd71e1c0a7246a7d…

MALICIOUS

PDF

76.3 KB Created: 2021-09-12 13:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-18
MD5: 6ea41ad86cd0b2e84a9fdb2227fb1b00 SHA-1: 8058a432a357d7f0cc16e7002679adcf55d1bb69 SHA-256: cd71e1c0a7246a7dbac85f2645d1ea4b6076502ed9e22133c7d0940fa402f0e1
154 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://irlanc.ru/uplcv?utm_term=robin+yt+vpn+apk+download PDF link annotation
    • http://descanso.verareyes.com/ckfinder/userfiles/files/16821574057.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/56687461665.pdfIn PDF document text
    • http://allier-genealogie.org/File:/22658629837.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5f3ecba88---54842629677.pdfIn PDF document text
    • http://swiss-ex.com/images/blog/file/rekawikufe.pdfIn PDF document text
    • https://learnrkb.jugalbandiresearch.com/ckfinder/userfiles/files/dulitivarus.pdfIn PDF document text
    • http://dooroc.com/tk/upload/file/duvizepokejosodajoxu.pdfIn PDF document text
    • http://llux.vn/uploads/files/15401493041.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/ruravaxovavado.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/rapikexaligudapojaj.pdfIn PDF document text
    • https://ceylanotel.com/firma/files/rabidusuzamulexufu.pdfIn PDF document text
    • http://ngocphuocjsc.com/public/default/ckeditor/files/tonudoburenadoxapuz.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///20219722573002.pdfIn PDF document text
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/3813297135.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/musawojonipuwimif.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/22668491374.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/pumaxufuwaju.pdfIn PDF document text
    • http://vejwun.cz/images/gipenikowaf.pdfIn PDF document text
    • https://jancsoalapitvany.hu/ckfinder/userfiles/files/69443862300.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/zagefanakek.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/jomobapejeme.pdfIn PDF document text
    • https://bonvoyageindia.in/ckfinder/userfiles/files/99372037512.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/nujimutijakipimexituwur.pdfIn PDF document text
    • http://vit-physio.de/file/janaz.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/kevagugu.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/91812370352.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/96811549535.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/61668160754.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_off0000c2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B2 10528 bytes
SHA-256: dd815e5d69a66f1b73572ae726a9480ef55e93d1ceed7e48e482418c83225b80
font_01_sfnt_off0000da9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9A 18088 bytes
SHA-256: 4a2eb24452533fcbf8cef4625baa5514ff04b72f3546a624b0d0096152561d9b
font_02_sfnt_off000109ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1