Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd2301e600f72b6…

MALICIOUS

PDF

78.6 KB Created: 2021-03-16 07:44:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 921e9396b7e4b125134817aa522b9799 SHA-1: da8e29078558434e6a2696a835a726b9e9b59904 SHA-256: ebd2301e600f72b6d8c57983800743db5f7eef1a30e2844d55a4ddc21da1bf33
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/123?utm_term=cars+3+ps3+game PDF link annotation
    • https://cdn.sqhk.co/dodirijobadi/ppvcYge/3d_printer_metal_car_parts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445341/normal_601b8c705e544.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/7tjtbPz/20941877079.pdfIn PDF document text
    • https://cdn.sqhk.co/piwewupovo/Pf01gho/kingdom_warriors_mod_apk_money.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_604d94f3d327a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450248/normal_5fd97c5c43fe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388048/normal_5fd3d11f3f914.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/zejizafujizusev.pdfIn PDF document text
    • https://cdn.sqhk.co/baxusowuripo/82idsij/1982432151.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/ibkgd64/lajanoruwewukivi.pdfIn PDF document text
    • http://rozefuzapotor.iblogger.org/free_skype_app_for_laptop.pdfIn PDF document text
    • http://xolokeminapi.getenjoyment.net/duravisal.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/taranis_qx7_firmware_update.pdfIn PDF document text
    • http://niluwipewuxasa.medianewsonline.com/xakugokuk.pdfIn PDF document text
    • http://fupodiruza.66ghz.com/62491297717.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/itv_news_reporters_london.pdfIn PDF document text
    • http://bilunet.rf.gd/pdf_adobe_acrobat_reader_8_free.pdfIn PDF document text
    • http://jowuzifuw.epizy.com/ponarum.pdfIn PDF document text
    • http://netojisabozop.rf.gd/tinivubod.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/62022347997.pdfIn PDF document text
    • http://kinikodiraxo.rf.gd/sunbeam_heavyweight_fleece_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/jikubigozete.pdfIn PDF document text
    • http://dosunadis.epizy.com/30008211498.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF121 5176 bytes
SHA-256: 2d368503d4fca80f97ecf0ca681046872345800f3f4cac4d9e24ba3f380c5285
font_01_sfnt_off000102a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A9 12928 bytes
SHA-256: 373c9c01202f155d66e78d95e53364cc92bb54c40bb87ae8aba725bed7fcff43

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