Malicious PDF — malware analysis report

Static analysis result for SHA-256 369873fe73e9fa1f…

MALICIOUS

PDF

131.1 KB Created: 2021-02-23 22:08:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d31de3b49184f74c4eeaebbfee781bbd SHA-1: 35a61d0d0306396b88359b457f6fb01bd7e954db SHA-256: 369873fe73e9fa1ff8b975dc84d00ca638fbc51fc93f3ed1ffda64428a4e39c4
156 Risk Score

Malware Insights

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

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=strong+concordance+88 PDF link annotation
    • http://apple-fruit.space/canadian_vehicle_bill_of_sale_formshcg4.pdfIn PDF document text
    • http://reweder.site/wormax._io_mod_apk_free_download7ienx.pdfIn PDF document text
    • http://tixshopclub.space/supplement_facts_template_illustratorczqlo.pdfIn PDF document text
    • http://creditreportusa.info/gobadapelisiuorba.pdfIn PDF document text
    • http://meetcabinets.xyz/admiralty_chart_catalogue_freekbr3v.pdfIn PDF document text
    • https://cdn.sqhk.co/bijilixiger/fjj1jaW/centris_near_me.pdfIn PDF document text
    • https://kowagazobavov.weebly.com/uploads/1/3/0/8/130874359/tibasuw-zuzumozu-dotasikigaf.pdfIn PDF document text
    • https://cdn.sqhk.co/kigowabalo/coCRnsA/fake_call_app_unlimited_credits.pdfIn PDF document text
    • http://topshops.website/kefututede27rs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pisik/vafog.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/asymptomatic_bacteriuria_pregnancy_nice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/free_bollywood_songs_video_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/beneath_sentence_formation.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_off0001c96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C96C 5196 bytes
SHA-256: 5de9f77f3bb8a920a99834bebbf7f6bbed1a4258a6cd54944c28fbe6b9fd7ca6
font_01_sfnt_off0001db20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB20 10516 bytes
SHA-256: ff47e948f7e298b8f07d675a6832e08062beaf6ccb71db97219be4157bf2e573

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