Malicious PDF — malware analysis report

Static analysis result for SHA-256 586ccf6b22603b93…

MALICIOUS

PDF

84.4 KB Created: 2021-03-02 20:20:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1b129d82bf77b661efac0a2e39785cd2 SHA-1: d44b8b82b718090edc627d3bd2d3a909cbecba30 SHA-256: 586ccf6b22603b934174fef51fe1ed91da438c4a4a1f1dbcf27b1d08f4a949a3
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 and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, contains references to 'Biblical conflict resolution steps' and is associated with numerous embedded URLs, many of which point to disposable domains or link farms. These URLs likely serve as lures for phishing or malware distribution, aligning with the 'Pdf.Phishing.Trojan' classification.

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
  • 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://lozipotod.ru/strik?utm_term=biblical+conflict+resolution+steps+pdf PDF link annotation
    • http://phrensy.co/norwegian_cruise_line_customer_service_jobs920k7.pdfIn PDF document text
    • https://cdn.sqhk.co/lofakekaf/1ia5hbA/ludo_star_2_for_pc_free_download.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/sapenapaxitimapupibxpwcw.pdfIn PDF document text
    • http://smartycredit.info/memisotuxuronexmp1l.pdfIn PDF document text
    • http://prizinsta.site/how_to_get_the_attention_of_a_child_with_adhdps228.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/gfjd9RP/vijarivosekefu.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/svibjbR/kozibojud.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/XhhhciO/queen_best_hits_cd.pdfIn PDF document text
    • http://teagreen.space/vedubovorapilejutegidrhccl.pdfIn PDF document text
    • http://bbcua.site/erik_satie_gymnopedie_2_piano_sheet_musicmgygd.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://medesawawolujim.epizy.com/rutinivajumiwigexomiwepof.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/junit_5_test_report_html.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_off00010023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10023 5220 bytes
SHA-256: 32046a4798ada5863d1402c69de4e02c6c6de900f01fa072a3d48b5dd443a6ff
font_01_sfnt_off000111d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D8 10644 bytes
SHA-256: 049d8a2c5172d105987f591eb268df451e54ca1a60c23aa563498e72ea5b06d5
font_02_sfnt_off00013660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13660 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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