Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f8f230720b0878…

MALICIOUS

PDF

75.9 KB Created: 2021-02-17 20:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5592c145e013c69625a00e287f91da30 SHA-1: 0d15b48ef7f41e7788041863d96c93cc095151e0 SHA-256: 67f8f230720b0878ef977fb142d2cac91d73e6ecce4bbefeb621fc76dac257eb
184 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to disposable domains and redirector infrastructure, indicating a phishing or malicious content distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely attempting to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=hp+compaq+8000+elite+convertible+minitower+specifications In PDF document text
    • http://discout.online/ginseng_prices_in_kyysdge.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/haK6KLv/xapejejovofowupogudogif.pdfIn PDF document text
    • http://comforfemj.fun/10613618145qorm7.pdfIn PDF document text
    • https://cdn.sqhk.co/vudebalox/bl3ibia/in_flames_pinball_map.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457298/normal_5fe25c7de19b7.pdfIn PDF document text
    • http://vnds-super.space/orc_village_ragnarok_classic6v0op.pdfIn PDF document text
    • https://cdn.sqhk.co/supuzeren/ifgf8AI/cover_fire_offline_shooting_games_size.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/RfhhaSl/27752692608.pdfIn PDF document text
    • http://usesucre.pro/velibabojinaluxowaxjbm9w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370054/normal_60088637e23a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384464/normal_6002c6461be7d.pdfIn PDF document text
    • http://helpcontactform.com/medical_pharmacology_padmaja_udaykumarfzjff.pdfIn PDF document text
    • http://bonuwefuganagus.22web.org/arm_a32_assembly_language.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484365/normal_5feb62f0182e3.pdfIn PDF document text
    • http://formblckr1.xyz/muxegokosasizab3l95d.pdfIn PDF document text
    • https://cdn.sqhk.co/loberutebe/hiakjdb/repasiximakedar.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/chiLKgf/72430664134.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tunazafagid.epizy.com/examkrackers_101_passages_biology.pdfIn PDF document text
    • http://zumewozuzetarun.epizy.com/knee_arthroscopy_rehabilitation_protocol.pdfIn PDF document text
    • http://takamuwemevofe.epizy.com/nejoduwaposejudakarefuxo.pdfIn PDF document text
    • http://sisawujeza.rf.gd/beatles_piano_sheet.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_off0000e73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73A 5876 bytes
SHA-256: 73b1a1eb1a39ee13d9790c7d299fd53db4bfcbbbd7d351643ea870f9c144506f
font_01_sfnt_off0000fb3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3B 11364 bytes
SHA-256: 8488ef45adbeb41598a633639ed45637843c3ba30e94ba9e31e160bc357200a7

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