Malicious PDF — malware analysis report

Static analysis result for SHA-256 4877ba91d064f32a…

MALICIOUS

PDF

392.4 KB Created: 2022-04-17 00:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-22
MD5: 3879e8579dc431148f3bcf5d1f776932 SHA-1: 32dc822c09195607b440d119ed8350c46ee4ac74 SHA-256: 4877ba91d064f32ab7d26812ffdf87185ee4590c9208108dc5883b3fb6924741
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7188

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://psycare-spb.com/userfiles/file/vafosasoke.pdf In PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16201be5a62d28---47322604609.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/43736087672.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1620be9da8edd1---16442030950.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/18288654593.pdfIn PDF document text
    • http://pcserviszlin.cz/ckfinder/userfiles/files/20922146266.pdfIn PDF document text
    • https://unovosti.tv/ckfinder/userfiles/files/88591031055.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/wuxulizerugivubezusir.pdfIn PDF document text
    • http://kindergartenhelden.at/upload/file/zatabasobemabigil.pdfIn PDF document text
    • https://pisesiwez.weebly.com/uploads/1/3/1/4/131453260/tilamemoxipifer_bofurijimulug_bevosalodow_kowiwo.pdfIn PDF document text
    • https://www.osazovanidps.eu/admin/kcfinder/upload/files/75941211328.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/4ae94dbac969f825ee0255d07b957f18/52189305656.pdfIn PDF document text
    • https://aimic.com/userfiles/file/lugisukeze.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/41820626675.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/162332d3dc2410---gudakelifiva.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/64243fb0926795b6a44dbd0f81c6eebd/5957525686.pdfIn PDF document text
    • https://xn--80aujdnb8a.xn--p1ai/kcfinder/upload/files/binepofibi.pdfIn PDF document text
    • http://sb-78.ru/files/file/rizutivokodewosasa.pdfIn PDF document text
    • https://xovokemopozok.weebly.com/uploads/1/3/4/5/134579322/sipeletabezowixo.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/162464a530fdfc---retevofagexuxi.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/pakese.pdfIn PDF document text
    • http://gzpropellers.com/uploadfile/files/28780369075.pdfIn PDF document text
    • https://virubavu.weebly.com/uploads/1/3/4/7/134755547/zukabex.pdfIn PDF document text
    • http://thamdinhgiadaiquang.com/img/files/46762386889.pdfIn PDF document text
    • https://cintaemas.com/contents/files/jituginexivejevojekofudid.pdfIn PDF document text
    • http://kieryk.pl/img/userfiles/file/7459092651.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/5949768441.pdfIn PDF document text
    • https://lubebubekawi.weebly.com/uploads/1/3/4/7/134714091/mibupegurititukufegu.pdfIn PDF document text
    • http://mayinluatudong.com/uploads/userfiles/file/serajebiwedijowubudewel.pdfIn PDF document text
    • https://goxufosoxewuje.weebly.com/uploads/1/3/5/3/135300646/jigexobokovuribo.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/pukupugiligutafisibe.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/vizetewulorom.pdfIn PDF document text
    • https://www.apsar.es/assets_back_office/js/plugins/kcfinder/upload/files/zarisebi.pdfIn PDF document text
    • https://huanghecables.com/d/files/figajivaselomulokozuzijo.pdfIn PDF document text
    • https://fecuq.co.za/XSRYdR1H?utm_term=warfarin+therapy+guidelines+malaysiaPDF 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_off0005b31f.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0005b31f.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005b31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B31F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0005cb31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB31 17572 bytes
SHA-256: 3f8acfe41bd30f50d46bca02bc7c3ca848d9de7b0aea0b5943e6fb8ff2e43386
font_02_sfnt_off0005f8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8BB 11032 bytes
SHA-256: 312b77ce55f0b4982542ee1b58178443456ca5330373a04c7bd63c340fc6018a