Malicious PDF — malware analysis report

Static analysis result for SHA-256 7205f6579aa83e9a…

MALICIOUS

PDF

83.4 KB Created: 2021-09-21 17:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 32a47f90d05e487ae26b467a11ea9c2e SHA-1: 89f47e3538387f7b76ab5750e8a78604f0bf3fc9 SHA-256: 7205f6579aa83e9a6d832d7dfe544dc19c25fa0a8a7adbe634121772f34ed117
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to form a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://ketchas.ru/uplcv?utm_term=planets+in+their+order PDF link annotation
    • http://plise.org/userfiles/file/dugegegetudazi.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/bb556a977b7b64e4303a0f09d7b78fbc/jilufuvotojibe.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16148f55ae4f26---79030307220.pdfIn PDF document text
    • http://www.jobibon.com/admin/userfiles/file/mipon.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109022344274142.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210908031653.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/xogetosivadowukepilu.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/mogozafuturagime.pdfIn PDF document text
    • http://dlastudenta.org/Upload/file/42530277353.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/61352874506.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/widegekedaxagerox.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/4398302373.pdfIn PDF document text
    • http://mawratanews.com/armedia/uploads/files/komugazasumaduwiwan.pdfIn PDF document text
    • http://dade666.com/userfiles/202109file/2021090122342370554.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/28819368071.pdfIn PDF document text
    • http://easyhypermarket.com/userfiles/file/92593283788.pdfIn PDF document text
    • http://garmaclima.com/uploads/ckfinder/files/petopirekof.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/naditirebulodixapet.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/32536982374.pdfIn PDF document text
    • http://9262895.ru/ckfinder/userfiles/files/gepulexawolapesenedu.pdfIn PDF document text
    • http://kccmaul.com/files/files/wivedemudenomiwuda.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/wodugosewutomeko.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/15377608478.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/63474923465.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/pogewogigo.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_off0000e44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44E 17404 bytes
SHA-256: 0c456487aa82e45e68dcc52ce1df907b61621e7f88ed4bc815f5459b85c611de
font_01_sfnt_off00011125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11125 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001293c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293C 10348 bytes
SHA-256: 2f07c99b1316879258ad2c0257052fc0f5980b687bbed5f81148be1193297a6e