Malicious PDF — malware analysis report

Static analysis result for SHA-256 334ee79e3927c076…

MALICIOUS

PDF

77.1 KB Created: 2021-04-07 20:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0ff31ca92276d8e5831a045a456e4e3d SHA-1: 63d16f0c6a39b407c4a21d840f73c83f6eabad8d SHA-256: 334ee79e3927c076d99d63a8fea661ffd1c7305c3ed7ba794cb00f428d1c7acd
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded document body, though heavily obfuscated, contains references to product names and application versions, which are likely used as lures to direct users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://golowaki.ru/strik?utm_term=garmin+vivofit+2+leather+band PDF link annotation
    • https://cdn.sqhk.co/josurowelimu/iwBEutc/kezafizok.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/gehigea/potegitizar.pdfIn PDF document text
    • https://cdn.sqhk.co/raserijene/ZgcZnge/67942727302.pdfIn PDF document text
    • http://miromawetibikew.mywebcommunity.org/datasheet_78l05.pdfIn PDF document text
    • https://cdn.sqhk.co/pagozixupezi/HhbgiSW/indy_car_racing_games_xbox_one.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/NdiiSQ0/mr_bean_movie_filmyzilla.pdfIn PDF document text
    • https://cdn.sqhk.co/libewepigux/gjjgeaW/gacha_club_download_app_store.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/8khgggV/chess_master_games_database.pdfIn PDF document text
    • https://cdn.sqhk.co/zulatobi/hec8ie2/48743420152.pdfIn PDF document text
    • https://cdn.sqhk.co/nunamarajop/fUzrk2L/why_isn_t_rush_hour_3_on_netflix.pdfIn PDF document text
    • http://suvuxivenorum.mypressonline.com/78780657057.pdfIn PDF document text
    • https://cdn.sqhk.co/temegolu/wHjh1FG/kogexatek.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/wW8cjbt/fedoxexotabine.pdfIn PDF document text
    • http://gokawojop.scienceontheweb.net/zikomakujabazizitupov.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/3hctEgh/52971697102.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_5020dc04632c496ebaf37cb47f4ffec7.pdf?index=trueIn PDF document text
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_d7ec44d009814053beb61f0320f1041c.pdf?index=trueIn PDF document text
    • http://ligoroxenafof.atwebpages.com/kenmore_elite_oasis_dryer_heating_element_replacement.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/bowflex_pr1000_home_gym_cost.pdfIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_1ef6ccebea2d412380ebcf8176f6415e.pdf?index=trueIn 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_off0000ebf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF8 5332 bytes
SHA-256: 348e8c3b0583adb034a313958327fe683542306a847aa05be5456766fa8d72df
font_01_sfnt_off0000fdfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFB 11636 bytes
SHA-256: b2ce9b0117b7de024d335d506fa71e3c540abaa5681f3bf2c4704de57c904779

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