Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f9c4d717c41194…

MALICIOUS

PDF

293.4 KB Created: 2021-12-29 09:42:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: 57aab4aeadda506dbbc77b850895d6ab SHA-1: 283065b68853406228683b809967e8bb5bb7aed9 SHA-256: a4f9c4d717c41194bee57eb5b4fc64806ce26eb20bdeace654f66318107e193a
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7234

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
  • 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.
  • 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://technoarc.net/userfiles/file/sufijof.pdf In PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161b53be20bf66---pipavabalanojulozo.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/zovifelobutaxotudanifazok.pdfIn PDF document text
    • http://www.msjcongregation.org/www/js/ckfinder/userfiles/files/vewefekidavosifuxagexuwo.pdfIn PDF document text
    • https://corpuz.greenjifa.com/kcfinder/upload/files/nupej.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/14754364469.pdfIn PDF document text
    • https://www.ocnistudio.cz/ckfinder/userfiles/files/76066242847.pdfIn PDF document text
    • https://12waktu.com/contents/files/2041962477.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/62341955802.pdfIn PDF document text
    • http://chinahk-ip.com/chinahk_ip/html/files/editor/file/jezon.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/45137004649.pdfIn PDF document text
    • http://mothertheresapublicschool.com/userfiles/file/wipabimuduxupijani.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/wekagenikelizuverinedi.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/6adb82865d146e566d2354b5ac4bc804/bawufijagojelokepuba.pdfIn PDF document text
    • https://szabolcsipeter.com/userfiles/file/kumawalebanisibukukanibi.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///56525969258.pdfIn PDF document text
    • http://kindergartenhelden.at/upload/file/54687880714.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/21881138538.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/63022415495.pdfIn PDF document text
    • http://gizmakina.com/depo/sayfaresim/file/zutapusilogikiwagewo.pdfIn PDF document text
    • http://ressourcengarten.de/azubi/userfiles/files/45510163652.pdfIn PDF document text
    • http://rakkhunnursinghome.com/user_img/files/40383151099.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/89926898013.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/D9plVHj2VOU/uplcv?utm_term=ignition+mobile+modulePDF 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_off00042cb2.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00042cb2.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00042cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42CB2 17356 bytes
SHA-256: 0d85e09ba33e12ef1a117b8c4b0d0550b5acf10301d0ee29cd016a1f7b3a960a
font_01_sfnt_off0004596e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4596E 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off00047012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47012 10352 bytes
SHA-256: 841e88813753d0bbd6e041a15960f824a9a1236eb18a9db6f8c3cef2fdfffefc