Malicious PDF — malware analysis report

Static analysis result for SHA-256 7821c4866926e597…

MALICIOUS

PDF

256.4 KB Created: 2022-01-05 23:51:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-16
MD5: 77b43999092ed741a05b303277715e6a SHA-1: f487822143780996ea39f5fe62b67786b4998842 SHA-256: 7821c4866926e597570431fb582c45608328a78d8a0c9b8cb34d1edaa0c8f1ad
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7309

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 http://berbun.com/user_img/file/15798256325.pdf In PDF document text
    • http://kozelskadm.ru/files/uploads/files/merewiguvomij.pdfIn PDF document text
    • https://chp-travel.ir/data/file/1821688824.pdfIn PDF document text
    • http://sccsfz.org/upload/2021-09/meveber.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/vivijugema.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/11926011343.pdfIn PDF document text
    • https://cdmsig2.com/ckfinder/userfiles/files/wixarot.pdfIn PDF document text
    • http://www.jasfec.com/imgs/uploads/69746416229.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/161488692b8e4f---52578906077.pdfIn PDF document text
    • http://archifolder.com/userfiles/files/46222217342.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/51990248027.pdfIn PDF document text
    • https://daotao.cungthieunhidanang.vn/app/webroot/upload/files/31926818470.pdfIn PDF document text
    • http://kaies.net/upfiles/210908191228293712zeyjax.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/27486130327.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/47949256110.pdfIn PDF document text
    • https://bisleriuber.genefied.co/ckfinder/userfiles/files/xuregimalopen.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16159591f98ba9---19340667817.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/dosubetisenoto.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/4045316bc596a843b2d9da0c7c4b43e8/pojukuxovuwejesorelokaxel.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/kevalolamejidalutilu.pdfIn PDF document text
    • https://ocw.tw/uploads/files/banijiputob.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161abcbe98def2---bovagatezoregilegawa.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/92693519820.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/ee3dc9d09bf89058ffb0ad92755a6cdc/nikopanimubekarefogop.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/32477237565.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/231036344412.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/vItLtdF7Pec/uplcv?utm_term=2n7000a+mosfet+datasheetPDF 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 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_off000390fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x390FC 18892 bytes
SHA-256: af9911481f843759fdf723df4aa5927b22eaf5aca65835c45b4356f13971652c
font_01_sfnt_off0003c255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C255 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off0003d8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D8F9 10576 bytes
SHA-256: c2687819734e8a8d7d7ffc951b2865e1dec53dbf04d532845043e0d6c3af6f25