Malicious PDF — malware analysis report

Static analysis result for SHA-256 460aa94c6d30a12f…

MALICIOUS

PDF

74.4 KB Created: 2021-01-27 13:09:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9edf604e1c36af5b6deaeb9efe692993 SHA-1: 7fa781892753b08a3ef8b5d06175886392517924 SHA-256: 460aa94c6d30a12fa3cae3c1519c185e2b9f9dee6fbe715e57deaa39bcf24e9e
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and is described as a link farm. The presence of embedded URLs suggests an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

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://druttle.ru/123?utm_term=uncle+once+removed PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415964/normal_60051a069bf49.pdfIn PDF document text
    • http://study-english-05.site/mewobuzuduriremujeqbxnt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410986/normal_5ff4ee2c67b4e.pdfIn PDF document text
    • http://cuzinfo.ru/wood_carving_projects_for_beginnerspc4sd.pdfIn PDF document text
    • http://1s.london/todolist_app_macqhtf9.pdfIn PDF document text
    • http://filuniguwol.22web.org/2841144529.pdfIn PDF document text
    • http://gopubewigofopa.iblogger.org/27372847000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_5fd81aa45adb3.pdfIn PDF document text
    • https://zugasunisozabij.weebly.com/uploads/1/3/4/7/134759734/tipafolul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490274/normal_5fd1be324835d.pdfIn PDF document text
    • http://hurleyshamburgers.com/at_t_digital_life_technical_supportervw9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469852/normal_5fe32cda07b20.pdfIn PDF document text
    • https://nuxajitavira.weebly.com/uploads/1/3/1/8/131871558/palemuruwigofapu.pdfIn PDF document text
    • http://noxitafevinuv.22web.org/cognos_tutorial_report_studio.pdfIn PDF document text
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/3523566.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478933/normal_5fe27824ae5d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420448/normal_5fdc1ce5239c3.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://paporoj.rf.gd/brittain_academy_test_section_5_answers.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_off0000db37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB37 4408 bytes
SHA-256: 81cfbb72da2593c70e256a7edf4c9843ad82c524a7b4b20dbb7ee3a931adbe21
font_01_sfnt_off0000ea08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA08 10740 bytes
SHA-256: 34c54663e328440ebbf78557929354dc1dfe59d224d915727df401ea60fcf6ad
font_02_sfnt_off00010e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E96 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.