Malicious PDF — malware analysis report

Static analysis result for SHA-256 f87f844fd27f3844…

MALICIOUS

PDF

74.1 KB Created: 2022-04-09 22:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-17
MD5: 491894fe2906d87afce6db4e1dfb5210 SHA-1: 8d8fb196b8f15163c08dfadb33ce82a640fab644 SHA-256: f87f844fd27f38443bf679228d5655d250906b03e0df0c1f19f650641fd725cc
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://sunuf.co.za/YmrXLWy8?keyword=how%20to%20change%20a%20thermostat%20heating PDF link annotation
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/451920.pdfIn PDF document text
    • http://daiquangsico.com/img_duhoc/files/lizoxukizukun.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/42648604218.pdfIn PDF document text
    • https://nimateson.weebly.com/uploads/1/3/4/8/134881528/d1fe743bd7.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/22bd91d3b0339bd81468c8167070b905/79308529770.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/95168122576.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20220331235224.pdfIn PDF document text
    • http://produkty.promiennik.pl/resources/files/zoworelubox.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16224f48d19749---53060995630.pdfIn PDF document text
    • https://nozuresosobud.weebly.com/uploads/1/3/4/7/134758814/vogumogug.pdfIn PDF document text
    • https://jasujoru.weebly.com/uploads/1/3/1/4/131483343/6417409.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/65217894519.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/kelimelivojibekemozutito.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/fabige.pdfIn PDF document text
    • https://carnac.kendalch.com/upload/files/kuxowajupor.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/loven.pdfIn PDF document text
    • http://www.dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/42652430935.pdfIn PDF document text
    • https://lapebezufidasaz.weebly.com/uploads/1/3/4/3/134316617/vonaxovema_fitojasovin_gisexojibimagas.pdfIn PDF document text
    • https://www.miroku-jp.com/system/js/kcfinder/upload/files/sipupokoxusunuvusimam.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_off0000bf01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF01 16680 bytes
SHA-256: f14473bed4a06c576bc5d97e5b41e45b4fa92719411e9f866fbe824b024e6700
font_01_sfnt_off0000ea60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA60 10708 bytes
SHA-256: f3358a8b43978e8b852c0884f40f652de43b2aadb19e79a3a4a1ad62f3a706d8
font_02_sfnt_off000102d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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