Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0881d7e56278bb5…

MALICIOUS

PDF

79.0 KB Created: 2021-01-29 19:46:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2ce4874af3ef34b29f2c0c9098c7d084 SHA-1: dd5dd90dbc104a0956fc610007d904c4cc32bf76 SHA-256: c0881d7e56278bb59b886c5c310aaf3c0a6eb1249776a6af2612adc6677a9b79
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 for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. It contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to contain metadata related to the 'Tripit travel planner app' and the authoring application, likely serving as a lure.

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://jacksth.ru/wb?keyword=tripit%20travel%20planner%20app PDF link annotation
    • https://cdn.sqhk.co/kewixoretuze/haSVgje/nobabefan.pdfIn PDF document text
    • http://idealicaitalia-oficial.site/mystery_island_pokemon_glazedguuhe.pdfIn PDF document text
    • http://latuha.com/3645204064zl6rr.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/lcb5hjd/91123765581.pdfIn PDF document text
    • http://jawuzoruba.iblogger.org/nuxobazijujukonajapi.pdfIn PDF document text
    • https://cdn.sqhk.co/sotisibu/dUmiIgd/gulov.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/UjdXhjB/menusebiriloz.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/xebaxegewubuno9xdpa.pdfIn PDF document text
    • https://cdn.sqhk.co/livefodam/fOjegfy/ruvakovotulawumunezigid.pdfIn PDF document text
    • http://3203epworthcres.com/open_house_signs_amazonlc0qq.pdfIn PDF document text
    • http://comforfemj.fun/upgrading_and_repairing_pcs_21st_editionwq1j7.pdfIn PDF document text
    • http://file-id.ru/othello_summary_shmoopew14u.pdfIn PDF document text
    • http://wazasutosas.iblogger.org/9671791343.pdfIn PDF document text
    • https://cdn.sqhk.co/sativomofij/13iiVIE/voice_changer_for_mac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zegudonokor.epizy.com/gikuvofo.pdfIn PDF document text
    • http://nuxidowu.epizy.com/cheetah_film_song.pdfIn PDF document text
    • http://pokuzanu.epizy.com/excel_lookup_in_different_sheets.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED91 4324 bytes
SHA-256: 3e5f708bd8f9861f8f53f1cfeada0f637b9cab5926ec9251fa1c2f252bff8c82
font_01_sfnt_off0000fc36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC36 10764 bytes
SHA-256: f05472dedcee6653de3f876f29296791a1407b61b02bd345149d3426fdd4bcf9
font_02_sfnt_off0001211e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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