Malicious PDF — malware analysis report

Static analysis result for SHA-256 2beea26cc3f5c7a3…

MALICIOUS

PDF

74.7 KB Created: 2021-09-13 20:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 846b01c8b8ed5d966f3713f9d92767e3 SHA-1: 0fbba8987a95f5f60a04a0cc3df3d67128e45d54 SHA-256: 2beea26cc3f5c7a339e557507d6b8fadc4ed5dee7e07cfca28777dad47012f7c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, pointing to numerous unknown URLs. While no scripts were explicitly extracted, the nature of the PDF and its link farm characteristics suggest it's designed to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e3d69cec01---nusodudojozimisibijo.pdf In PDF document text
    • http://progettogeometra.it/userfiles/files/gapufawuxomavub.pdfIn PDF document text
    • https://gjbuyerbroker.com/userfiles/file/23084525072.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/retodepotomipoguvomexe.pdfIn PDF document text
    • https://volandovia.it/public/fileeditor/file/volutuxakegiwatiture.pdfIn PDF document text
    • http://markone-tools.com/upload/files/dawinopunanuvolesunij.pdfIn PDF document text
    • https://www.ijdsir.com/ckfinder/userfiles/files/71086827279.pdfIn PDF document text
    • http://drumlockingclamp.com/FCK_Editor_Images/files/xokozirobulo.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/8620930960.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/wezuv.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/25515826196.pdfIn PDF document text
    • http://trungtamsangloc.vn/uploads/ck_upload/files/vuroxiwuduxumevukojavob.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d30416a80---pozerobatirir.pdfIn PDF document text
    • https://www.carnesvarejo.com.br/assets/ckfinder/core/connector/php/uploads/files/renojidaf.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/pomatoviwibagot.pdfIn PDF document text
    • http://asr-net.ru/uploads/files/banopiwogululusexana.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/97913351545.pdfIn PDF document text
    • http://www.vnos.vn/app/webroot/uploads/files/gelorekigegited.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/36332752687.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/32294013670.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=which+country+is+the+most+populated+country+in+the+worldPDF 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_off0000c042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC042 11072 bytes
SHA-256: 0ddf1898d507b1a85c9e21ac2e5171b3900cfa61c34b47525f22c64acc2b0b6e
font_01_sfnt_off0000d9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F3 16852 bytes
SHA-256: 59280705fcd445ff798353a8ed25965315d227808b051d62e37ef1c2f2b44936
font_02_sfnt_off00010512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10512 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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