Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb99d408c9abb8a…

MALICIOUS

PDF

85.9 KB Created: 2021-08-17 21:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 05d75d076340f7c60a3e408fa8dca8c0 SHA-1: 20583af391080c5eab99d8c61ac0fe6d49e1723c SHA-256: 6eb99d408c9abb8ad23501e3b5bf3038552bc3110e58b24d50e1c2342a3676e5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable hosting domains. These links likely lead to phishing pages or further malware downloads, constituting a spearphishing attachment attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • 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.
  • 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://gizaviation.com/uploads/files/mepalilojeriwopok.pdf In PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/2304fd92c36018bc072ea72965489e6b/89990860403.pdfIn PDF document text
    • http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/84120783613.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/tofajunaburijoguvumela.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/0244b0faa9fa4eec7920bee15c540cb5/kufat.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/5828374264.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/zogilesevakumekojagib.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/68935351587.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/98221841945.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c47d8ec8165---77294296745.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/80334093672.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/2469504818.pdfIn PDF document text
    • http://kabaretyimpresariat.pl/Upload/file/89035923384.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd677b7f48---tuderopulaxek.pdfIn PDF document text
    • https://essuances.com/ckfinder/userfiles/files/32557847395.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/pififite.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/viwanagigurover.pdfIn PDF document text
    • http://zpkprzemysl.pl/ckfinder/userfiles/files/sutipolutasav.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079606a83a1f---65320847176.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/butepewazezidura.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a32b9224ffe---zigosuwumutijila.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e33876d349a---dukepepidejigelu.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61b1fd6c97---vobezizobazen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=does+my+head+look+big+in+this+book+summaryPDF 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_off0000e9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E0 17768 bytes
SHA-256: 7ad952ede702e9d372d3040eb403e7a2700b93b098e4b4aa819c1be540c4ed37
font_01_sfnt_off00011737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11737 11144 bytes
SHA-256: db0da72aab0f1b795b9cff3ea0f69a1927e778cef45d69709e8a5a9a75d0c919
font_02_sfnt_off000130db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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