Malicious PDF — malware analysis report

Static analysis result for SHA-256 2298096d410cff9f…

MALICIOUS

PDF

73.6 KB Created: 2021-05-16 22:40:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1e7ec7c385bfcd03c6ebb0031c5dc87a SHA-1: 6ace3097df0ab18c8a2a6d5187a4a086f9ce9187 SHA-256: 2298096d410cff9f9cc1b9f99532d820f5ed71384a87ddf40b057fcb313296cd
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many hosted on disposable domains and utilizing UTM parameters, suggests a link farm or phishing lure. The document body, though heavily obfuscated, contains references to product names and application versions, likely serving as a deceptive cover for the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/strik?utm_term=britax+advocate+arb+cool+flow PDF link annotation
    • https://zonilalafujagep.weebly.com/uploads/1/3/4/7/134731182/kesimigavaduga.pdfIn PDF document text
    • http://xufonewujisos.scienceontheweb.net/29579728563.pdfIn PDF document text
    • http://vonowaz.iblogger.org/crimes_against_humanity_card_game.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/giweduxidan.pdfIn PDF document text
    • https://jutikuned.weebly.com/uploads/1/3/5/9/135966087/6189092.pdfIn PDF document text
    • https://famoresarit.weebly.com/uploads/1/3/4/6/134680052/9516b57f8fa.pdfIn PDF document text
    • http://duberasikap.22web.org/16905608337.pdfIn PDF document text
    • https://japutiluzot.weebly.com/uploads/1/3/5/9/135991977/gokujuviweduk.pdfIn PDF document text
    • https://kagojidumone.weebly.com/uploads/1/3/2/7/132740327/dikubajani-dabolapevimijip-wupamixukan.pdfIn PDF document text
    • http://legexebe.medianewsonline.com/jibexedezujif.pdfIn PDF document text
    • http://roxixil.iblogger.org/pufunenisabamew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vebagakid.onlinewebshop.net/nicholas_sparks_latest_books_2018.pdfIn PDF document text
    • http://vovogejezubu.rf.gd/lidalezezivos.pdfIn PDF document text
    • https://d5e9a058-cbdc-4968-ba72-30cdbf1e36a3.filesusr.com/ugd/9cfd0a_62186ca4ca31480fa96b821bf00ee064.pdf?index=trueIn PDF document text
    • http://gofanukeguwul.epizy.com/jogovisamori.pdfIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/avid_one_pager_template.pdfIn PDF document text
    • http://parusorudejes.epizy.com/91702890509.pdfIn PDF document text
    • http://pifutujotot.epizy.com/vpn_apk_mobile.pdfIn PDF document text
    • http://tibepaxun.rf.gd/35299161723.pdfIn PDF document text
    • http://bisidajidosetuj.rf.gd/namatituxijevoruvamabadu.pdfIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_7e0b5f92c25348719b2c4c616a1ed11e.pdf?index=trueIn 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_off0000cc43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC43 5248 bytes
SHA-256: 04b9394bb9296f7d80457984ed5f4c8671a593b54be0ff8a4c39d9e47dbdf330
font_01_sfnt_off0000de47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE47 10820 bytes
SHA-256: 159cdfc67813332f57a5a4c29cf1702ce0bd2de092bc201bc4de1812cb3fd60b
font_02_sfnt_off00010265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10265 16084 bytes
SHA-256: fb27248ec02d804caa0ce6a8dd06a8f0f211157336bc50f6c382585ff5fe3da3

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