Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc4e076adb8f712…

MALICIOUS

PDF

96.9 KB Created: 2021-04-26 12:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 060ad19418ad6897e05f8699acf65e91 SHA-1: d43bac8cce0e27f7240a43504136dd7a05ee3af2 SHA-256: 0bc4e076adb8f7122547df4da78ee05277ff2ea85791dc4319bd20ed8e9e33a3
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL `https://ponafet.ru/strik?utm_term=flowers+for+algernon+chapter+15+summary` is the primary IOC, likely serving as a lure or initial payload delivery mechanism.

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://ponafet.ru/strik?utm_term=flowers+for+algernon+chapter+15+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488604/normal_60191a9790cb5.pdfIn PDF document text
    • http://telewapor.22web.org/jonijamoruxobinujokejo.pdfIn PDF document text
    • http://vudatibapikapak.22web.org/html_to_python_converter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491665/normal_5ff23977e62dc.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/73069173018.pdfIn PDF document text
    • https://cdn.sqhk.co/feluxolid/2idhRgc/nogumidawipap.pdfIn PDF document text
    • http://dujilupu.22web.org/the_scarlet_letter_summary_chapter_1-8.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/61991073046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484835/normal_6010968e157e8.pdfIn PDF document text
    • https://cdn.sqhk.co/kinuneba/7NjjWd4/75999605347.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CsqibHb/duzibadufefubonatamarukez.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
    • https://uploads.strikinglycdn.com/files/4c6f03a0-ff10-4191-ac68-9d4a6e21a987/4505762723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b0b48ac-5a1b-4fb5-8469-aa5f2565d76a/fujarabapisujani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/026605ce-c7b3-4bda-bcb6-922148a3ff1e/dofedasopowizoxujubax.pdfIn PDF document text
    • http://vobikeretuwof.atwebpages.com/soundcraft_ui16_software_pc.pdfIn PDF document text
    • http://bugazepoja.onlinewebshop.net/cg_police_merit_list_2020_download.pdfIn PDF document text
    • http://doritiwenoxa.onlinewebshop.net/10872253315.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_off00012f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2B 5588 bytes
SHA-256: 020dfaa758fa2b956e68df2ad97843688f7c2d7854f5ad039e9da4ead94c163e
font_01_sfnt_off00014226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14226 11540 bytes
SHA-256: c49f9d0fc17894ce0df2e2801bee9a28d17487e24234dd699b607d594380bc32
font_02_sfnt_off0001686a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1686A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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