Malicious PDF — malware analysis report

Static analysis result for SHA-256 35d97c835ea5e511…

MALICIOUS

PDF

76.2 KB Created: 2021-05-07 03:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 285e9ce9b034fc05762503ce3089756a SHA-1: 9435cd212549be8682601c173f53f8d17dff4cf7 SHA-256: 35d97c835ea5e511e0be6ce020c0ed5c8c03fdaa583b7e0a78c9ca9f6a201864
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://resalured.ru/strik?utm_term=how+to+cook+black+beans+on+slow+cooker PDF link annotation
    • https://cdn.sqhk.co/sepexapubu/ibhexjb/20022001937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426820/normal_600eb6c8da15e.pdfIn PDF document text
    • http://robolab.one/sea_of_thieves_pc_errorg8oti.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/wukitulumak.pdfIn PDF document text
    • http://lishop.site/audio_cutter_merger_joiner_apkf2l9u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475866/normal_5fd8b097c60a9.pdfIn PDF document text
    • https://cdn.sqhk.co/lolatonuvesa/fncITif/epe_foam_sheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413117/normal_6065fd1d9a7d9.pdfIn PDF document text
    • http://xtreme-sport.ru/129655703494w3js.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416661/normal_5fe2539120e67.pdfIn PDF document text
    • http://fitokaps.xyz/4418864542xdtvj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403428/normal_6015462d5438a.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/hhehhii/catfishing_tips_for_rivers.pdfIn PDF document text
    • http://tonojodozif.mypressonline.com/how_to_measure_echo.pdfIn PDF document text
    • http://menbp.online/damodaran_on_valuation_bookoaezz.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/oibBXii/fireboy_and_watergirl_forest_temple_primary_games.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/b8663bf1-dc28-4596-8c8d-464eb7bfbd3b/33289007927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f67430b-9fcf-4e05-80b1-810116656c34/pokemon_deluxe_essential_handbook_kmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a01d6258-763d-4687-93f1-26a9b8f8a2cf/kenmore_elite_he5_steam_gas_dryer_not_heating.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_off0000ed2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2C 5052 bytes
SHA-256: 4cf177d1300487feb76bca8a7b0202aaf76a0b13b44be5804863ada423f0fe93
font_01_sfnt_off0000fe77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE77 10860 bytes
SHA-256: 5a4fcb205a62772844ad03c4b65ccde4745167e06411c93619d1dea9ed2ed8d5

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