Malicious PDF — malware analysis report

Static analysis result for SHA-256 425fc1bb04ace1a1…

MALICIOUS

PDF

299.4 KB Created: 2022-01-09 06:58:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: b6baed27f373c0604e28bc5abd9310e7 SHA-1: 116cd6fd01f913bed09ae7bb43bccb5e1045f1cb SHA-256: 425fc1bb04ace1a12f400ca9a8073a27bb8e70bd357c42bb9a4e5f6b2e006518
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7849

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.
  • 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.
  • 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://krisoc.ru/uplcv?utm_term=esc+arterial+hypertension+guidelines+2018 PDF link annotation
    • http://caratow.nl/userfiles/file/voxinesofanebokudir.pdfIn PDF document text
    • http://naturalwonders.com/uploads/files/22777317669.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e08f2cbd62---58440516560.pdfIn PDF document text
    • https://webrobogo.hu/kepek/sujuz.pdfIn PDF document text
    • http://cechtg.pl/files/editor/files/pugovadulivagagesesitibem.pdfIn PDF document text
    • https://nucamsa.es/userfiles/files/munivuvabuko.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/45378085686.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161a54b1c9c2e1---riwekiromam.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/e7a7f78b00cabae49e9afd3e58d4f70e/21999891476.pdfIn PDF document text
    • http://centromp.it/userfiles/files/padagupeso.pdfIn PDF document text
    • http://travelweeklearningcenter.com/app/webroot/upload/files/31185034548.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/dezisu.pdfIn PDF document text
    • http://behtarinekhodetbash.com/files/files/27245745185.pdfIn PDF document text
    • http://archive-2011.humandoc.pl/attachments/file/tefokeperazitopu.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/1495264628.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/32560054222.pdfIn PDF document text
    • http://domki-kopalino.pl/pliki/wudugafakum.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/l108h21rp986iunt5v61nvsjrq/joviwolopabifozixabixefeg.pdfIn PDF document text
    • https://corpeverest.com/ckfinder/userfiles/files/pofazorexanatubevidafev.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/raxomige.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/lojonogowobuvijoga.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/dodesow.pdfIn PDF document text
    • http://sgrdpandher.com/userfiles/file/68833805781.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/161ab9e731d28c---puzomedebi.pdfIn PDF document text
    • http://test.currentaffairsfunda.com/assets/kcfinder/upload/files/72131869639.pdfIn PDF document text
    • https://tidaksusah.com/contents/files/roforipi.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_off00043c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43C37 18072 bytes
SHA-256: 303844e1f660c19e325b865984fbaac6e8dbd7aee59df90d633ae8e389d4e610
font_01_sfnt_off00046b5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46B5B 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off000481ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x481FF 11492 bytes
SHA-256: d654b392c6d7bbaf87cca2eb8d758e478a10e5faffa39ee6de59dee9a1303dd3