Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fde06dade24ab34…

MALICIOUS

PDF

86.7 KB Created: 2021-06-12 20:58:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 78671a9545f704ec75131e478d0b6c9a SHA-1: 8b6c40fb018ecf8a38b9676764c976513688a048 SHA-256: 1fde06dade24ab340c4b00c05158bd3315c57324237b65ad1fcc7f91e672298a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://inwebjor.ru/uplcv?utm_term=how+to+get+minion+slots PDF link annotation
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2d490cbbb---27660107919.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b84e6dc486c---440333122.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/57591006248.pdfIn PDF document text
    • http://landpas.pl/upload/file/gegulafogoxanoweruvugo.pdfIn PDF document text
    • https://tidurmalam.com/contents//files/sobigobomomuxabiladupap.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/8871994e23a9c1c96191582c481aea6e/tokasuzenosonotamosulub.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/3fbae6d27a525ea789dbfff268b85814/kuvawopuzufej.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/gezowadavaxazuge.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1d2b6341b---ruxadovafigomaxa.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/ffg77jjja85nbao4r0q0ee01p5/70095918301.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/dezanugunizugowizuwuxe.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/93aad7493955e2bc2472d202991bda1e/57636963049.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/badap.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/pitibe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off00010057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10057 4752 bytes
SHA-256: f4e8d8d2242528683a6bb5617ec9f39193c7a75450f425ec528936b9c2adce75
font_01_sfnt_off0001108c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1108C 10700 bytes
SHA-256: e473b5cafea976880103e4ede2cc6b2abd6061290f6b4f04b931d58e63b6e4f1
font_02_sfnt_off00013561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13561 16580 bytes
SHA-256: efe53ab63aeefc300647b2e0dcb8f561006911f342cacc9f7da66853bd0bb8ad

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