Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdcc783225bc9c0c…

MALICIOUS

PDF

153.4 KB Created: 2021-06-10 06:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 71bfa2696218ef68d4fb71fe8f3332be SHA-1: 3c235ebe629f86b2addd2202dbd7e5277d7c5f32 SHA-256: bdcc783225bc9c0c6e3fc60c2c571e7b52f0ac91f7feb92f8636286c20382dc1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://irlanc.ru/pbw?utm_term=tintin+and+the+picaros+read+online PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4502188/normal_5ff650327b60a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410006/normal_5ff7cc8f0ca40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421468/normal_603e8f32c36c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467274/normal_604a2c4909265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401517/normal_60357f414a283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459337/normal_600bca1f92f8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419818/normal_5ff5e1cf21848.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448558/normal_60371e7a2a93e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418365/normal_6018a783d2bad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502870/normal_6026091ea1a42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415334/normal_5ff4ae10d8e19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff3566b7-1193-44d9-8a0a-ff3b4b85d66c/ninodenutuverevopepezaz.pdfIn PDF document text
    • http://kunozulig.pbworks.com/f/wijewowutaramijinekedadek.pdfIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144617430/46183513925.pdfIn PDF document text
    • http://fomefegaf.pbworks.com/f/fascinating_womanhood_free.pdfIn PDF document text
    • http://fodorafirig.pbworks.com/f/descargar_rom_pokemon_soul_silver_espaol_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3978e114-3e18-43b0-b1e8-c54f5bef1a06/sound_blaster_zxr_audiophile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa99fa9-d527-43d5-9679-c8ade53b0676/gta_san_andreas_cheat_mod_apk.pdfIn PDF document text
    • http://ritijix.pbworks.com/f/chandni_chowk_market_closed_on.pdfIn PDF document text
    • http://gizonokape.pbworks.com/f/un_ninja_en_beverly_hills_pelisplus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3006f4c6-d14a-4d24-9bb7-ca8068683401/13550931332.pdfIn PDF document text
    • http://pesivop.pbworks.com/f/julunik.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://scripts.sil.org/OFLIn 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_off000202b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x202B6 5112 bytes
SHA-256: 39afd00d1c06d0189f23d57d7fee5dc48a1759bb42bcdeb21eb9ca419466e6d4
font_01_sfnt_off0002140d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2140D 14624 bytes
SHA-256: 4e784eede11106bec93fb90f902f613c3aa57edff29218b94d9ae4b27348476d
font_02_sfnt_off0002412d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2412D 16100 bytes
SHA-256: 1be743c11efd1db6eb0b1d59ff599fce1244630bd3a52e256ed85df637fffceb

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