Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb3fb8a46b915fa7…

MALICIOUS

PDF

78.6 KB Created: 2021-05-14 09:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 765437218ed5bea2d1dd4b12bf5721a3 SHA-1: 8382d0f789c1400c404ef2c88859f3073918b77d SHA-256: eb3fb8a46b915fa7f7cfe656e93830f366cee63621a89921ae491ca1db6fb662
186 Risk Score

Malware Insights

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

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 0.9994

Heuristics 6

  • 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 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://nipisod.ru/strik?utm_term=new+gospel+praise+and+worship+songs+2019 PDF link annotation
    • https://ponigeje.weebly.com/uploads/1/3/0/8/130874529/808faa.pdfIn PDF document text
    • http://alisaborodaenko.design/95315260097rr5hq.pdfIn PDF document text
    • http://vuwimoxit.mygamesonline.org/sowizovemivigob.pdfIn PDF document text
    • http://vatetuda.scienceontheweb.net/sokazemag.pdfIn PDF document text
    • https://podosutopo.weebly.com/uploads/1/3/4/5/134590637/3276640.pdfIn PDF document text
    • https://cdn.sqhk.co/kinirebuseva/qXhhm67/top_trending_music_videos_today.pdfIn PDF document text
    • http://wosutopanoba.mygamesonline.org/penyakit_jantung_koroner_usu.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/fhi5uuK/basic_grammar_book.pdfIn PDF document text
    • http://padojuputiki.iblogger.org/excel_sheet_won_t_scroll_up.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/how_to_tune_a_25_hp_evinrudeubmfd.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/3jiggij/waves_tune_ableton_live_9.pdfIn PDF document text
    • http://sehq.xyz/26785320622dunh8.pdfIn PDF document text
    • https://pekeweluxema.weebly.com/uploads/1/3/5/3/135304067/jariz.pdfIn PDF document text
    • https://lujipened.weebly.com/uploads/1/3/2/7/132740552/cf896fe.pdfIn PDF document text
    • http://puzigodemabotod.iblogger.org/95615353405.pdfIn PDF document text
    • https://cdn.sqhk.co/winogolelog/0KNiaAe/vojorep.pdfIn PDF document text
    • http://lunamawel.22web.org/3583200930.pdfIn PDF document text
    • http://itfamily.pro/cen_tech_battery_charger_says_wrong0aqbp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://latosenepodukum.rf.gd/can_monks_use_weapons_5e.pdfIn PDF document text
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_443975b4c01345cd85d55a6bfea606b1.pdf?index=trueIn PDF document text
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_897c9f2edd1041c28826de44eb19724c.pdf?index=trueIn PDF document text
    • https://849cba27-c1c2-4801-a47f-514a08c45c3c.filesusr.com/ugd/7f7a2c_45e391ee1ffa43e3b153be19f8ba02a2.pdf?index=trueIn PDF document text
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_d2cc1f611abd4ad7ac06e859caaca1e4.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_off0000f406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF406 5764 bytes
SHA-256: bdc2ada10b97820d890631d2384e6e308b96f9bbed15f9fed03da7e74b05dee1
font_01_sfnt_off000107c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C0 10980 bytes
SHA-256: 87e1d3ce7dde7cd095649358598436ec007d6587eef22dfd58cf663ef32a878f

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