Malicious PDF — malware analysis report

Static analysis result for SHA-256 23d546f8d9146127…

MALICIOUS

PDF

80.4 KB Created: 2021-03-18 10:47:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d105766ecfc79c4aae0115415c9c7824 SHA-1: b26b43bde9bb4632092067c62bfa5eadbe9da08c SHA-256: 23d546f8d9146127edf151ceef9f71328b730ecf6500138370bff23148302357
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 0.9991

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://baarspo.ru/strik?utm_term=lg+washing+machine+is+not+draining+water PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4529780/normal_5fe2550b4bebe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492600/normal_6007c84fe8a34.pdfIn PDF document text
    • http://siruxovilojo.iblogger.org/free_skype_7._5.pdfIn PDF document text
    • http://piwakere.iblogger.org/grosnug_light_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481282/normal_5ffb07c417ee6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490380/normal_6013dbbdd0532.pdfIn PDF document text
    • http://penoligis.22web.org/bhajan_video_song_hd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469104/normal_60497097a35c3.pdfIn PDF document text
    • http://retenenu.iblogger.org/nudewozip.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/2c71abf7-6cb5-49b6-b54c-da77151a0431/gosetozudunipixikileto.pdfIn PDF document text
    • http://zerason.rf.gd/jivixojexel.pdfIn PDF document text
    • http://jusakurufawotol.rf.gd/java_8_stream_convert_list_into_map.pdfIn PDF document text
    • http://kotidaw.epizy.com/driver_safety_incentive_program_template.pdfIn PDF document text
    • http://wedizakur.epizy.com/12129067612.pdfIn PDF document text
    • http://zinofamokolete.rf.gd/initiation_au_bouddhisme_tibtain.pdfIn PDF document text
    • http://vaxopokabevup.epizy.com/wizolufopex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5822ab33-94dc-43a7-83e1-e00cb9f1f4f1/89863771137.pdfIn PDF document text
    • http://solatilexi.epizy.com/65645244394.pdfIn PDF document text
    • http://meromodaw.epizy.com/97319656565.pdfIn PDF document text
    • http://wunixaxujosobif.rf.gd/xifufugebogapazubakan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fd124e8-8c91-4c6b-b2b0-4a5de005d60e/fundamentos_de_marketing_digital_google_activate_respuestas_modulo_3.pdfIn PDF document text
    • http://savagit.rf.gd/renejixuvibabezesudodipux.pdfIn PDF document text
    • http://newabef.rf.gd/59613864050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e748a7b-3eef-424b-8f6c-e104d1f19d70/supply_chain_management_programs_in_florida.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF9 5352 bytes
SHA-256: 9c0e08a108d50c7dc5d77a6920a732a6bcba0f1578c111837deebefb2d94bb9e
font_01_sfnt_off00010f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F18 10876 bytes
SHA-256: f13f561f33d79259935cab7627b23831ec83e69555f091506a32146dce115928

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