Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca0ab167bc16992…

MALICIOUS

PDF

98.5 KB Created: 2021-09-06 17:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9a7ff1c248763d824d0a0bc8307dc361 SHA-1: 65a9bf4263783a49a1258edf53155cb0a2ef6031 SHA-256: 6ca0ab167bc16992a7d821828208a58e13eb54e4e20769d10bc736210761bb53
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, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites, leveraging a common tactic of spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://allytemp.ru/uplcv?utm_term=enfermedades+emergentes+en+mexico+pdf PDF link annotation
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed7fcc0879---94098471311.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/xigutedamusesogi.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/21313963438.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608772ce19406---morefojifinawiguvubuzixok.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/491ca7e2bbdd608d0e5e8d59a11d7c1f/nuzujede.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/folazunemenaxup.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/7394142754.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/c4388a698e1da76a052552c2646a63d4/toziwivaju.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/a43b567a28c2e6857ec100d04d1db493/geluwapapugumufo.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/r6pfd7lad0opsom2dvam3ii590/62317301584.pdfIn PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/puxuvupevubibitiwenagow.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/roxukizelomimitu.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/a569907aa2d9b667071d5c069cafda37/65524574250.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/92254830183.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/83343369890.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d8cb816ee---61347541338.pdfIn PDF document text
    • http://z500.si/files/xofatasan.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/kafiluwox.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/93546210164.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b599266e83---kazuxexekifudi.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/wabelejemafe.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/tasolafogatuvafujezelora.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/21742447234.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/rososogokije.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/38733416231.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_off00011743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11743 11004 bytes
SHA-256: 61a814219a7289f4eed7ad702b4c5d1fb6f76b0bc93b7bf8af9e1638aaf2edb0
font_01_sfnt_off000130a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000148b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148B9 20408 bytes
SHA-256: b31f9dee130ef2f158415555aab7cd168e3d9c3ebefe2f1b2327e5935b039b83

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