Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae4e482334135e89…

MALICIOUS

PDF

68.3 KB Created: 2021-03-08 05:26:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: faa5fe4a55c7cadabb5d9115f87b68dd SHA-1: 8176e97e31a3f07efbaed3f7329746631080897b SHA-256: ae4e482334135e89c9f426320dd6c19d1ba6c219470f1e84ee2208384d1ff37c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing site disguised as search results for hardware specifications. No scripts were extracted, but the PDF structure and URL analysis point to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=dell+optiplex+790+specs+cnet PDF link annotation
    • http://bogavevi.22web.org/global_tech_simulation_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuronufepu/gizSalw/nitirapemagomum.pdfIn PDF document text
    • https://cdn.sqhk.co/lifudidu/NifTgfd/66450096277.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/23klpVc/48103576286.pdfIn PDF document text
    • https://cdn.sqhk.co/gujurolekuma/gjA1gep/alone_pics_for_whatsapp_dp.pdfIn PDF document text
    • https://cdn.sqhk.co/zisubiziwu/PYgcQgh/nujafenotu.pdfIn PDF document text
    • http://ketrovk.xyz/synology_surveillance_station_8.2_license_keygen5pb0g.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/43583358909yn9ug.pdfIn PDF document text
    • https://cdn.sqhk.co/xudapurofoz/9jaWhbG/walopalolupura.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/eVgdQaa/hay_day_cheats_that_actually_work_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/e9HT2Zx/game_room_guys_pinball.pdfIn PDF document text
    • http://stavki.link/cowboy_games_pc_free7y8ji.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/jHjblMp/trench_conditions_ww1_facts.pdfIn PDF document text
    • https://cdn.sqhk.co/zatuwifezub/XwVqibT/defifarapowizawi.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/febopa/95394743419.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/22132648273.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/their_eyes_were_watching_god_chapter_10_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/dilasogo.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/andy_serkis_planet_of_the_apes_transformation.pdfIn PDF document text
    • http://rebivik.epizy.com/fojejegekijikomodego.pdfIn PDF document text
    • http://letugupinuvanu.rf.gd/honda_gx200_pressure_washer_for_sale.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_off0000ce9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9E 5068 bytes
SHA-256: 9d90da53fecc7be852cc7d0811dfb257bf1d0853ba44651feec407baec089423
font_01_sfnt_off0000e009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE009 10608 bytes
SHA-256: 27210bf20c2d3726f007e612f98425ece72bfef15bbee01bd39a0240c7292965

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