Malicious PDF — malware analysis report

Static analysis result for SHA-256 11558c255201f811…

MALICIOUS

PDF

75.4 KB Created: 2021-09-08 12:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9b6cc173c68093e3cbab8893c599217a SHA-1: e768550e1e6aa3eb82e354bf6243cb49255cbaed SHA-256: 11558c255201f811355d79103facadd69097bb79e27c1a4cb680d3b8dbe393a7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The PDF contains numerous embedded URLs pointing to potentially malicious sites, indicating a phishing or malware distribution attempt. The presence of many distinct hosts and UTM parameters suggests a link farm designed to obscure the ultimate destination or to track user interactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=panasonic+water+purifier+pj-3rf+manual PDF link annotation
    • https://detmers-kontejner.hr/files/53201197751.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/76175765259.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/ed993629c5b7d26894b1129a6d23c3e4/namasowatix.pdfIn PDF document text
    • http://owop.challengersports.com/ckfinder/userfiles/files/84800436624.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16131873ddc8be---74866103444.pdfIn PDF document text
    • http://ues-rb.ru/themes/ues-rb.ru/files/74203077109.pdfIn PDF document text
    • http://ahjygjg.com/upload_fck/file/2021-9-1/20210901190108587142.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/vevugeweg.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/23149239162.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/difupimobekavalerus.pdfIn PDF document text
    • http://robvancampen.nl/userfiles/file/61788036283.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/bepizudepavas.pdfIn PDF document text
    • http://greenld.com/userfiles/xadatufeparonibededemulil.pdfIn PDF document text
    • https://maintogelonline2.com/contents/files/87197607194.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/ladulexogixusosisugaze.pdfIn PDF document text
    • https://franchisebusinessadvisors.franchisebrokerwebsites.com/broker-site/files/files/tojilivelu.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/14945119323.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/segesejiwuwuk.pdfIn PDF document text
    • https://finliz.lt/i/File/nejixejomerodelop.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/bitexulexemaxobodesakuneb.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/zejubujuxizavalipipugof.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/31962666224.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/95229676779.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/4f1932b79b40966fafd7c709fd493091/96380243841.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/15369446255.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_off0000be84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE84 17848 bytes
SHA-256: 533d0994797a95cdc7180505a837496db08f679360e56b5ebb97f4875d7d7528
font_01_sfnt_off0000ed4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4D 11164 bytes
SHA-256: a5be4c6d5833fbea1ddc168c220cbf5dde913cb7c4976c6ce81a4dbaff8a5bc8
font_02_sfnt_off00010788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10788 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1