Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d200ae9fe46a75c…

MALICIOUS

PDF

89.6 KB Created: 2021-09-17 14:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2df00f770bb67484220025eab0f39538 SHA-1: 96d1cd63611920e00549f56d14aad6eee5ace10f SHA-256: 5d200ae9fe46a75c58111bdbc597fec63d910e916ee5b3ff70f83efd86af5fb9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous external URIs, many of which are structured as link farms pointing to disposable hosting, suggesting an attempt to distribute malware or phish for credentials. The presence of embedded URLs and the overall structure strongly suggest this document is part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://archism.ru/uplcv?utm_term=prince+of+persia+the+sands+of+time+game+download+for+pc+full+version PDF link annotation
    • http://homelife-superstars.com/image/files/79424753649.pdfIn PDF document text
    • http://nktrading.qa/file/files/dimibuxelarezotupunetoto.pdfIn PDF document text
    • http://hbtsap.com/Upfiles/news/file///24422428055.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/38600203083.pdfIn PDF document text
    • https://ckv-siemreap.org/ckfinder/userfiles/files/dajebitudagoroxozo.pdfIn PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/zivilowamimokajowovalopad.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/rowubosizatuvixirimatilam.pdfIn PDF document text
    • http://rpsbchamber.org/editorData/file/xifedazotusevagoduma.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/b91ba3126a47f590b095d94308a362f2/72855477840.pdfIn PDF document text
    • http://bajkolandia-leszno.pl/userfiles/file/61698015771.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/74369004147.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/poboxepejobetolipilokat.pdfIn PDF document text
    • http://nordicwalkingturak.hu/_user/file/vepakozokasapije.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/masuburi.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/67596733038.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/dogumojarakafaweg.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/lawelevutovule.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6e8860aab---64572006134.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/dolotixepevobizatezif.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/kalepuso.pdfIn PDF document text
    • http://naszemotyle.natura2000.pl/imgturysta/files/46178642821.pdfIn PDF document text
    • https://peusch.lu/userfiles/files/16604286251.pdfIn PDF document text
    • https://majubesar.com/contents/files/57981513299.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/nixerotal.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_off0000f718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF718 11320 bytes
SHA-256: 25ff7ee433a0e761001236c95f5a95dbf26e4cc15ea24205be651c2e36aefcf6
font_01_sfnt_off0001115a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115A 17640 bytes
SHA-256: 16f5531666f8a8e904b8f2f4cfe32d775974e002c9a80b35143ac304e2b7ad78
font_02_sfnt_off00013eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1