Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea62357872c930a…

MALICIOUS

PDF

81.6 KB Created: 2021-03-04 23:58:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2236762b5a5092c75c5410764df95677 SHA-1: 0de65a691b86b00bc282f0b015fe8a942999c4e8 SHA-256: 9ea62357872c930ad5a52b0aa479f6d8b9837419d0b855cf55eec8bd426196da
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, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a significant heuristic firing indicating it's a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the PDF structure itself points towards an attempt to redirect users to malicious sites.

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://zajinet.ru/strik?utm_term=2012+ezgo+rxv+service+manual PDF link annotation
    • http://sweetygirl.club/16388984606j0vfd.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/SySEhfQ/93577023380.pdfIn PDF document text
    • http://vegifeda.mypressonline.com/finilitutisesenewe.pdfIn PDF document text
    • http://mon-cmso.best/fios_remote_volume_stopped_workingw2n4k.pdfIn PDF document text
    • http://slampochka.ru/14660802485v7rgn.pdfIn PDF document text
    • http://zatoxuvisovapuf.sportsontheweb.net/44553027429.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/y8egZgc/bounce_back_loan_natwest_foundation_account.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/fhjhaij/82463811574.pdfIn PDF document text
    • https://cdn.sqhk.co/volakase/ieigjjm/best_music_player_software.pdfIn PDF document text
    • https://cdn.sqhk.co/kevekelobivo/gikhagj/animal_jam_codes_for_free_membership_forever_2020.pdfIn PDF document text
    • http://btsworld.org/vewamijijalaginawamusesr6j3.pdfIn PDF document text
    • http://eagleaff.com/13094135345nkw72.pdfIn PDF document text
    • https://cdn.sqhk.co/basinasedu/LMihcE4/40167183369.pdfIn PDF document text
    • https://cdn.sqhk.co/pugipepa/gjaghmI/twitter_stock_price_news_today.pdfIn PDF document text
    • http://blockingscenery.com/minecraft_1.1_1.1_apk_aquitdudz.pdfIn PDF document text
    • http://itanto.space/ringtones_for_phone_callsd1bm4.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/toshiba_32c110u_stand_screws.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/dja7XhC/car_racing_games_for_pc_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tudusiki/dhdvzdV/80449095211.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fojakosi.atwebpages.com/bipowopiwid.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF829 2828 bytes
SHA-256: a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
font_01_sfnt_off00010223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10223 5528 bytes
SHA-256: 2ef45bed7113abe3ddaf3585b8fdb3c478928bba2fdad8be4f7d394e1be13b3e
font_02_sfnt_off000114ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114EC 9988 bytes
SHA-256: 40fc6706ef50c07cdbcec026d75bdf379ce5cf9fc5bbc441745f8c04c36226a5

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