Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ce2a2cb3a51584…

MALICIOUS

PDF

174.9 KB Created: 2021-03-29 00:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: cdd7b0129e44eaada1bfb4ead2aaae0f SHA-1: 66a940d0b275f1c786136d63c1ca817620d20f41 SHA-256: b0ce2a2cb3a51584d5cee67726ae3a008b4ded50ebe179dc79417dda6b53ca2c
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous external URLs, indicating a link farm designed to redirect users to potentially malicious sites. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, suggests an attempt to execute malicious code or further facilitate redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/award?keyword=babylon+talmud+pdf PDF link annotation
    • https://cdn.sqhk.co/vujuzira/hdigrEd/30821172412.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/how_to_use_smart_band.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/56832846490.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/nebovak.pdfIn PDF document text
    • https://cdn.sqhk.co/zutujodara/hfjjzhe/nijofodirumokejafi.pdfIn PDF document text
    • http://jotusimemirido.sportsontheweb.net/51833888626.pdfIn PDF document text
    • http://zezasarasojid.mywebcommunity.org/punovuxunow.pdfIn PDF document text
    • http://getfreecreditreport.info/jotazazepurbbzli.pdfIn PDF document text
    • http://leon-stavki.info/19163032785ewmvy.pdfIn PDF document text
    • http://fragcups.com/how_to_scan_using_epson_perfection_v600_photouw8gr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_d14bd5f1429e45748c4e588ca37add63.pdf?index=trueIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_5ad893e32e3143f39597654f287708bd.pdf?index=trueIn PDF document text
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_bad36efae3514be4a9bb95469a1ec74c.pdf?index=trueIn PDF document text
    • http://fidalanono.myartsonline.com/dell_optiplex_9020_power_supply_replacement.pdfIn PDF document text
    • https://d670dda7-df53-4ef1-8eda-d3256df28744.filesusr.com/ugd/dbbbec_1eb71757983e44c989b5661aa6830a2e.pdf?index=trueIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_ebcedef2efb840a998a77f35baa9ad8f.pdf?index=trueIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_460f89a0b2e44b9f86b20a7b22911c4d.pdf?index=trueIn PDF document text
    • http://zirutabu.myartsonline.com/labofawusugadujopo.pdfIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_eac78b42f8d64ee4b3430009cabc8722.pdf?index=trueIn PDF document text
    • https://a3c73713-be4b-4c8d-a01f-dab92ecb4e1a.filesusr.com/ugd/5df860_a4f123d2d1034871b7188d7f0a1c0ffd.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002678d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2678D 5204 bytes
SHA-256: a57546a0b3ee1e2227a5dc525dcc7018b193a7ab5af73e643554dd7606c47494
font_01_sfnt_off00027934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27934 16984 bytes
SHA-256: 0361c50df4c465ca904973fd45e7caf0faa30df157769395af08902a368db125

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