Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8beeee08796ac94…

MALICIOUS

PDF

81.1 KB Created: 2021-09-14 09:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d96e49d610c0ca8df7420ee5ab8bb3e6 SHA-1: d659434064004f366f41243b858b122715db4252 SHA-256: e8beeee08796ac94776b81ff1a72a67a0e8839ebc230dba06d96e15ab2fa5389
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://queure.ru/uplcv?utm_term=android+app+green+screen PDF link annotation
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/deruvezinapebepotog.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/2820862821.pdfIn PDF document text
    • https://www.totalblissbeauty.com.au/application/third_party/ckfinder/userfiles/files/51911892593.pdfIn PDF document text
    • https://mgogs.com/mgfiles/file/55120760339.pdfIn PDF document text
    • http://pincodehub.in/userfiles/file/50849891247.pdfIn PDF document text
    • http://kool-house.com/upload/editor/file/62577723635.pdfIn PDF document text
    • https://eghamatsafar.ir/basefile/eghamatsafar/files/28545249794.pdfIn PDF document text
    • https://phr4u.com/files/vulipigutedafunabutital.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/paganoloroz.pdfIn PDF document text
    • https://mehfermobilsaglik.com/userfiles/file/21382270195.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/65322625771.pdfIn PDF document text
    • https://mfdesign.hu/files/file/lofimawojulawozoj.pdfIn PDF document text
    • http://saipanbooking.com/FileData/ckfinder/files/20210909_E7C14BD2D667E81F.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/wubenamim.pdfIn PDF document text
    • http://lovesenergy.nl/file/10401554585.pdfIn PDF document text
    • https://zmiz.hr/userfiles/file/20723973712.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/tusedoxonofimi.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/wirojewodowugema.pdfIn PDF document text
    • http://www.neoneofitou.com/ckfinder/userfiles/files/xetakoganowafejufi.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/d35f352ba7a85bd3595ab8aeae35d2b5/tulinedona.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/nexupojiretubepe.pdfIn PDF document text
    • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/12788780921.pdfIn PDF document text
    • https://ever.dacola.com/upload/files/nurugokuranumepu.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/qgoj51uglv9jl7fo1i0d3uhcq1/nokasamikuzivoze.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/7371493034.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///seduvironujagik.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_off0000daf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF3 10528 bytes
SHA-256: 2e6fc71da5f933fda287028e1a1aa41ff4523e490b71ab37528a091d5bf9ba70
font_01_sfnt_off0000f2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADE 17116 bytes
SHA-256: 8a55e61bcd7cee09f75a34f44668e7ba7cd7ffef0f24c7ff0e2cf284aec4214f