Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60948becf79c1e6…

MALICIOUS

PDF

90.0 KB Created: 2021-03-12 16:06:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 4d24fc50d7234b1407e35fce8021f407 SHA-1: ebdb4f564b5f8d8d9a73c38537449a566460ba2d SHA-256: b60948becf79c1e68e44734ecb12845958c703914d1b97e470b719cec22c32b6
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Static analysis revealed numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The PDF's structure and the presence of external URIs indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/strik?utm_term=where+can+i+watch+the+first+fifty+shades+of+grey PDF link annotation
    • https://jigaposu.weebly.com/uploads/1/3/5/3/135397088/vorex-ketowiwez-zemawaposero-liwubakuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492600/normal_603d34f2541d1.pdfIn PDF document text
    • https://gifenatewa.weebly.com/uploads/1/3/4/4/134480542/c884b2.pdfIn PDF document text
    • http://sutarakikim.scienceontheweb.net/my_cousin_rachel_full_movie_online.pdfIn PDF document text
    • http://mimedilubaj.22web.org/iso_9001_version_2015_english_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405437/normal_6013b7a6c397e.pdfIn PDF document text
    • https://dafemiperufukoz.weebly.com/uploads/1/3/1/3/131379503/2b22117b9d12362.pdfIn PDF document text
    • http://femokotafi.66ghz.com/nuwudaja.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/880069099.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/wu_tang_american_saga_season_1_episode_8_watch_online.pdfIn PDF document text
    • http://kumokopilomeme.22web.org/vehicle_air_conditioning_repair_cost.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380876/normal_5fc700f9243bf.pdfIn PDF document text
    • https://kazenatujexisof.weebly.com/uploads/1/3/1/6/131637291/2651711.pdfIn PDF document text
    • http://mazezoda.22web.org/how_to_overcome_emotional_abuse_from_father.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452865/normal_5fdb1af2a51aa.pdfIn PDF document text
    • http://zobabikox.medianewsonline.com/ernest_hemingway_cats.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://padusij.onlinewebshop.net/hyperkalemia_management.pdfIn PDF document text
    • http://fixapesexarux.rf.gd/cuales_son_los_fundamentos_tecnicos_del_futbol_wikipedia.pdfIn PDF document text
    • http://faxunarin.epizy.com/secret_garden_dreamcatcher_piano_sheet_music.pdfIn PDF document text
    • http://jokubamobivavum.onlinewebshop.net/21375174494.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/jukoxawimoze.pdfIn PDF document text
    • http://luzarog.rf.gd/15895961822.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/riridutosin.pdfIn PDF document text
    • http://laxonuzuw.epizy.com/buy_dd_miniatures_in_bulk.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_off00011b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B46 5460 bytes
SHA-256: d3bffef62c1003c3dad7f34340cd471d941bbe3cd3c10ec62550ca04def11fa7
font_01_sfnt_off00012df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF7 14216 bytes
SHA-256: 701a9bf563b9e5825e80303686dc27cc4cf77c1e20fee0eb6c1aa87401d6d16a

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