Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee69d90e56bc7ad…

MALICIOUS

PDF

81.4 KB Created: 2021-09-19 09:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 665adf91e6728df4a211d47fc52b4416 SHA-1: 41449dde74240d429bf306f2e7021663b20c5c21 SHA-256: 5ee69d90e56bc7ad544855e3f1e5be4be4e8094fcb40c7449d9323a21fb8be22
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://ketchas.ru/uplcv?utm_term=google+pixel+2+root PDF link annotation
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/sezedib.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/83599684741.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/soruvinuretikezunoma.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/notexamojukusudumilevo.pdfIn PDF document text
    • http://onroerendgoedindex.nl/images/uploads/36118206957.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/3853767189.pdfIn PDF document text
    • https://tidurmalam.com/contents/files/28783828891.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/xedowuxejuwipalabuw.pdfIn PDF document text
    • https://studybrilliant.online/app/webroot/img/userfiles/file/runuruxozezokuge.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109050514215474.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613d49e299b69---78724572576.pdfIn PDF document text
    • http://highgaincomposites.com/img/file/2021936483.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/37532761779.pdfIn PDF document text
    • https://menu2uplus.com/images/file/28470148686.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/zubozujoku.pdfIn PDF document text
    • http://win-sonic.com/ck_imgs/files/vebuketakefafajulejezeso.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/lanivarojum.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce4c806af1---vimorarejilusoxojawokax.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/wojewepulekaweket.pdfIn PDF document text
    • http://prakseologia.eu/userfiles/file/vimunex.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/82484158411.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/22261541748.pdfIn PDF document text
    • http://gattoneva.pl/pages/userfiles/file/31524709544.pdfIn PDF document text
    • https://vinasimex.com/uploads/file/nerunodegusox.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/91950180624.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdf7437817---22680683547.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_off0000daf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF7 10252 bytes
SHA-256: fbd030f283e423c193ca587fcf87e7945ba22f23a5de480430e69d818ecf3c49
font_01_sfnt_off0000f237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF237 17296 bytes
SHA-256: 6c8effbe0b4ad70ea3ba6309a8b82abcdc79980d4d0ceb0f78a8771890504c2d
font_02_sfnt_off00011faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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