Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ebe0c24fded6c4f…

MALICIOUS

PDF

88.8 KB Created: 2021-03-08 08:48:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: db2835e58c9157e1f611f6dc5a6a3bd9 SHA-1: 9e51516d567ce9a28fa2ba1027d22cd97b58c9ee SHA-256: 0ebe0c24fded6c4f5ae16ce8072d56641fcf4fe4283d7474de04ebb87f6b11b0
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with several pointing to disposable hosting and exhibiting link farm characteristics, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to contain a deceptive title related to a popular movie, likely to entice clicks on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/strik?utm_term=what+does+the+end+of+rise+of+skywalker+mean PDF link annotation
    • http://nenugatigubom.66ghz.com/coronal_section_of_heart_worksheet.pdfIn PDF document text
    • http://inscarusa.info/soruwiripepizevezulepulfw07p.pdfIn PDF document text
    • http://bibotabelik.22web.org/luxerejunase.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/12068153392.pdfIn PDF document text
    • http://lifolibi.sportsontheweb.net/bebepudajafigewexatowejas.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/f7LBDa3/satisfying_slime_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/haiiyje/zalunuj.pdfIn PDF document text
    • http://tamakedesununod.mywebcommunity.org/learn_chinese_speaking_app_download.pdfIn PDF document text
    • http://circus.market/67274226942lq3iu.pdfIn PDF document text
    • https://cdn.sqhk.co/webegodebav/clPEgje/custom_woodworking_shops_near_me.pdfIn PDF document text
    • http://hookup671.site/how_to_turn_on_bissell_spotbotw3cgk.pdfIn PDF document text
    • https://cdn.sqhk.co/midipijikami/jaQjRgc/folozapivutidef.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/rupatojuko/bubekekinesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed705507-baf5-4486-bd2c-2b0b03df0c47/geganuvomofi.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/why_the_rich_are_getting_richer_and_the_poor_poorer_ielts_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/192d7ee3-c331-4a00-9f1c-e896a68499ba/42013701958.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_off00011f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F24 5416 bytes
SHA-256: bf4d4f0531eedcced9d2ffd914a630c08af96cb5279f11015dbea2ca3e2ef2a3
font_01_sfnt_off0001318c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1318C 10712 bytes
SHA-256: d0f6dc8d39646839ec8a7576781c7b555e59dba1b78a69b2d7e49a87bba75eb2

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