Malicious PDF — malware analysis report

Static analysis result for SHA-256 74cae0ab96a31060…

MALICIOUS

PDF

71.0 KB Created: 2021-02-10 13:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 63bcc08bcfc5677f95a9f33f45f359cc SHA-1: ceb48eb935e801d1ef08ed2f87805e4a63980574 SHA-256: 74cae0ab96a310600118ca32b6d0c51179fd02df33991b88a02ce9a3aeb585ed
126 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'jacksth.ru', suggesting a phishing or malware distribution attempt. The PDF structure and the presence of external URIs indicate it's designed to redirect users to malicious content.

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://jacksth.ru/123?utm_term=cronus+paintball+gun+barrel PDF link annotation
    • http://gijokamamijole.iblogger.org/bikini_bottom_genetics_packet_answer_key.pdfIn PDF document text
    • http://the-job.ru/442153371366gjfn.pdfIn PDF document text
    • http://klyshsheff.xyz/vehicle_drop_off_wildlandsvx3du.pdfIn PDF document text
    • http://ridegibulas.22web.org/net_framework_win_10.pdfIn PDF document text
    • http://teniran.22web.org/aggiornamento_android_lg_g7_thinq.pdfIn PDF document text
    • http://bezigex.iblogger.org/5872506065.pdfIn PDF document text
    • http://operationhomeplate.com/audio_joiner_program42k5k.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://s3.amazonaws.com/sifawekujiki/97269529937.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/the_informant_trailer_rotten_tomatoes.pdfIn PDF document text
    • http://miloxagiwe.epizy.com/parchment_paper_sheets_bulk_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/gdb_peda_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/4427729153.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/45558541077.pdfIn PDF document text
    • http://fubegamo.epizy.com/zojawusik.pdfIn PDF document text
    • http://zozoresupiz.epizy.com/claremont_primary_school_nottingham_ofsted_report.pdfIn PDF document text
    • http://teworubinogo.epizy.com/65661336019.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/rebitavenuk.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_off0000c9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E6 5032 bytes
SHA-256: 92c1c98acd2bd2cd465a4617062efb93e66a6823e233433c7d45c9bca37af3a2
font_01_sfnt_off0000db09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB09 11160 bytes
SHA-256: ff1e127ea8402f53847567592f3c123c58e63cd99a2a0eb10c761ee7a75837ab
font_02_sfnt_off00010113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10113 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.