Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0d68724425a1c6…

MALICIOUS

PDF

83.9 KB Created: 2021-09-13 08:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 71e36ac4ae0b845b09bef4dabd8f1c86 SHA-1: 2279354987aaa9ca42a715cbca4bc5a3d7bff193 SHA-256: 0f0d68724425a1c664105a3526975e0a3e8990140efe07477864c9d5dd92bbfd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links to external domains, with one specific URL identified as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://qhchemicalsfeed.com/upload/files/janonokupaj.pdf In PDF document text
    • http://jd6618.com/jd6618/file/2021-9/file/LwpCms2021_09_12_07_21_01_2250.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/32724615846.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/25923291758.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210907_E7365EF25144701B.pdfIn PDF document text
    • http://deltools.com/userfiles/file/milusesebunitufinujavomi.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/fumiporusajidewidutoboto.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/xovis.pdfIn PDF document text
    • http://kk-gorenjska.si/uporabnik/file/jorunumujox.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/3173909258.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161381e632d23f---nimedu.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9cfe2f76c---ditud.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/61460751596.pdfIn PDF document text
    • http://congseng.com/uploadfile/files/59218260332.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/zobosuvizalit.pdfIn PDF document text
    • http://smingames.com/ckfinder/files/29762201246.pdfIn PDF document text
    • http://hdg-gmuend.de/userfiles/files/luvidozogegi.pdfIn PDF document text
    • http://dastone.ru/userfiles/file/20495306739.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/45689202519.pdfIn PDF document text
    • https://www.fangjin.org/ckfinder/userfiles/files/49611583206.pdfIn PDF document text
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/xigerizovawavig.pdfIn PDF document text
    • http://orosweb.hu/userfiles/file/29896687504.pdfIn PDF document text
    • https://cam-ceeds.org/ckfinder/userfiles/files/junejase.pdfIn PDF document text
    • http://esistore.be/userfiles/file/wokokosikunapimuz.pdfIn PDF document text
    • http://studioarchoggianiepartners.it/userfiles/files/7581807684.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=top+10+games+for+android+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_off0000e164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE164 11168 bytes
SHA-256: 011ed9cd7733753223391c0d5dd5bc71cb4495e8073588884a3b025eee1fc484
font_01_sfnt_off0000fb34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11346 17880 bytes
SHA-256: 768b33f3c6ae6a50bc25a87cbeebf46a2894cdd058aaa879a24b7e9b40423bfa

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