Malicious PDF — malware analysis report

Static analysis result for SHA-256 049a292d0d33998a…

MALICIOUS

PDF

94.9 KB Created: 2021-08-25 11:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 82c8bc02936a877e3ed37777d3cb2920 SHA-1: ebb8f238c5071432914dfb98e75dfc72f5f5b30d SHA-256: 049a292d0d33998a812fa8b1182f1444b3b0fa7790600eb48d779196f52e0b0e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

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://nomylo.ru/uplcv?utm_term=mucus+in+nasal PDF link annotation
    • https://prosaison.fr/userfiles/files/96419607467.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/bunazalafelisubudupufe.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/88959203439.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607665964823b---72809598768.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/8a1e14be8b2f85a851c077ba831fd01a/nilagutu.pdfIn PDF document text
    • http://compsult.net/userfiles/file/10061986577.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de0113c64c4---10815532776.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/87385483407.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afbed908d56---96973144581.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/67038218094.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/68489762617.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/livopajetifemuselonejori.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b85471dd9---megusudepemawugu.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ad24cdeae---sumimolalibimowavomosi.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/55313201480.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/80638333166.pdfIn PDF document text
    • https://valeaflorilor.ro/img/uploads/file/muduwexisusiboz.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/pikogawujepobojiwofumu.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/sidodetabi.pdfIn PDF document text
    • http://rokakisreunion.com/clients/a/a8/a85ca1e4cfc2bb88d767af442173b437/File/nalelumonomabaximotosegod.pdfIn PDF document text
    • https://tosto.cl/ckfinder/userfiles/files/vazulefepitalifijune.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610784a339f89---fotuwufaxi.pdfIn PDF document text
    • http://bndweb.nl/upload/files/mupakuvakejuxekugupemaju.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/rakan.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_off000111c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C4 17636 bytes
SHA-256: f30338975c2d1c6190d6cf0a92aa18653115d653c6c329b1887d096d392d1291
font_01_sfnt_off00013f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15790 9868 bytes
SHA-256: c85d833d3c0308b06ad1e2c92a935ca420a2820af4ebed1c729b837ab570af2e

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