Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2130a3e0d331dc0…

MALICIOUS

PDF

85.6 KB Created: 2021-03-07 17:47:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ce3b9b386c8d2b4eb5f1e2748d704169 SHA-1: 582620a5a0a14c9411c55344e1877df3c504e28c SHA-256: c2130a3e0d331dc0b5f8afc0582a742fbe9cd0d4234c11cb1de114f8eb136c70
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jumiwimov.ru/strik?utm_term=solicitud+de+novio+word PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496380/normal_5fdafd4ac0dc2.pdfIn PDF document text
    • http://frukt.space/51785157024kkrlo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_5fd1368da69de.pdfIn PDF document text
    • http://serdyukov.pro/4863852957080dz8.pdfIn PDF document text
    • http://kyponnik.online/person_tracker_toolkit_2017_appb0et9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485435/normal_6026937b10c28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495400/normal_5fe03c5ad9e39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383308/normal_603126680f049.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411931/normal_5fe45b95584f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478131/normal_5fcbeeccaca09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489422/normal_60037c83374a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424024/normal_5ffa52b4e7953.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420939/normal_5ff8d370a1dff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e54ebb8-9dee-4fbd-8b8e-0996d27c5972/the_crown_season_4_episode_5_songs.pdfIn PDF document text
    • http://fofodas.rf.gd/what_is_all_saints_day_and_all_souls_day.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f81c934-59a1-4020-a8d2-f9b73af41103/connect_xbox_one_s_controller_to_bluetooth_headset.pdfIn PDF document text
    • http://luvibiw.epizy.com/ios_13_beta_3_iphone_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d69cfb9-1ba1-452a-914b-287e58eedadd/apex_tv_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/605dce42-53aa-478d-91b9-fa2273261262/dumorasunetuvelavunover.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA5 4800 bytes
SHA-256: dc3c48d2c7bbe356bcf0b752b360b23d096d1a85f7e3d0bfe98b4b93c6728041
font_01_sfnt_off00010c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1A 12164 bytes
SHA-256: a735499f8fcbc1f6b58c4d295348a0c60454aa30615a8ca9032d33e112be1580
font_02_sfnt_off000133ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133FF 16080 bytes
SHA-256: ae4c1039909c6b18400a693790947520403f0a9c3cdc5bdc37254682f4165006

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