Malicious PDF — malware analysis report

Static analysis result for SHA-256 23395d8cba3e0a27…

MALICIOUS

PDF

148.1 KB Created: 2021-03-18 15:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9f145f5d70a40bfb03253cbcde291c8f SHA-1: 19479ac5cb1c6dd229b6d90001be1d5c2dc778ad SHA-256: 23395d8cba3e0a2782bd8326be83ae5ba3ab2383436f39332c8d7dfd1b398c47
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 0.9997

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/123?utm_term=transformers+1+bumblebee+car+year PDF link annotation
    • https://cdn.sqhk.co/rujiwujik/fgmjFgd/cross_stitch_patterns_christmas.pdfIn PDF document text
    • https://cdn.sqhk.co/gadujotev/Xj0xhiQ/wubatugujegipilogunulozov.pdfIn PDF document text
    • http://free-at.pro/47216393188scg0f.pdfIn PDF document text
    • https://bolifalaloken.weebly.com/uploads/1/3/1/4/131438202/2583256.pdfIn PDF document text
    • https://cdn.sqhk.co/gidetixi/uoKohh2/lion_temple_run_games.pdfIn PDF document text
    • http://static-start.top/83606721406px2yc.pdfIn PDF document text
    • http://chambre.xyz/taco_bell_soft_taco_fresco_nutrition_factszny8a.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/aignibd/pirate_ship_craft_template.pdfIn PDF document text
    • https://cdn.sqhk.co/lewonuvaxu/gSgjUgc/19621744115.pdfIn PDF document text
    • https://cdn.sqhk.co/fiduzosi/jcgdiei/puxizubuvefitobevox.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/4njc2B8/msr_pocket_rocket_stove_kit.pdfIn PDF document text
    • http://fivabigenarewo.22web.org/pdf_audio_reader_for_windows_7.pdfIn PDF document text
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/venomase.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxudofexal/Ehehc2T/70242013909.pdfIn PDF document text
    • https://gixisisopovi.weebly.com/uploads/1/3/4/7/134713576/ketajiwedokifa_gepuxuxel.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/00daf8df-f3a6-404a-937b-8edd8d7a2883/tolagezesikuluruzu.pdfIn PDF document text
    • http://givovuzozej.rf.gd/husqvarna_hu775h_blade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b5e741c-b2fb-451a-8728-bef154e530d2/fapijuxoke.pdfIn PDF document text
    • http://wodelotozajuta.rf.gd/process_dynamics_and_control_2nd_edition_solution_manual_chapter_1.pdfIn PDF document text
    • http://wafovekideg.rf.gd/who_has_the_best_refinance_rates_right_now.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_off000207d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x207D0 5272 bytes
SHA-256: 63704f2ac719325a6bfbd50ccdfb8411c3db50d1f1fa10b292e04d3514515dfe
font_01_sfnt_off000219b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x219B6 12184 bytes
SHA-256: 23cfe95a160e56ef2be96e4d0cfdde2244dd50836067d288066d0943e684e4ca

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