Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d164d1e032f3602…

MALICIOUS

PDF

72.7 KB Created: 2021-03-07 10:50:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3ac90692ec209e4e2504a2b665d14a00 SHA-1: fcdc345ff4caf988b9940e8527ecb94abc9bc477 SHA-256: 5d164d1e032f3602feeee67e83c54a269734929083081936d8655d43340bea43
126 Risk Score

Malware Insights

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

The file is a PDF that contains numerous embedded URLs, many of which point to disposable hosting services and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The PDF's content, though heavily obfuscated, suggests a lure related to a 'Hyundai workshop manual', aiming to trick users into visiting these malicious links.

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://maypoin.ru/wix?keyword=hyundai+workshop+manual+pdf PDF link annotation
    • https://fezewemekerod.weebly.com/uploads/1/3/6/0/136050953/41374.pdfIn PDF document text
    • https://gakuwalexutibok.weebly.com/uploads/1/3/4/3/134332976/3e7a500e.pdfIn PDF document text
    • https://cdn.sqhk.co/rawavuzom/PsKH4ie/4165719794.pdfIn PDF document text
    • https://cdn.sqhk.co/lofesaxudiwo/eYichd4/12654231016.pdfIn PDF document text
    • http://mynasert.online/98765928350uoyww.pdfIn PDF document text
    • http://alisabor.design/dell_xps_8300_motherboard_bios_updatevcdaq.pdfIn PDF document text
    • https://cdn.sqhk.co/siwowoso/3XClVih/thi_p_chuc_m_ng_dam_cu_i.pdfIn PDF document text
    • http://1offpark.xyz/serial_utorrent_prowoggy.pdfIn PDF document text
    • https://rupulosulokor.weebly.com/uploads/1/3/4/7/134773135/xuzukoworedisit.pdfIn PDF document text
    • https://dodoxatufasiw.weebly.com/uploads/1/3/2/6/132681482/wimig.pdfIn PDF document text
    • http://alesyasemiletova.com/international_s1700_dump_truck_specsbkpgm.pdfIn PDF document text
    • http://nijowefipegivu.iblogger.org/emuparadise_ashes_cricket_2009_apk.pdfIn PDF document text
    • http://tradebot.space/warhammer_only_war_core_rulebookt7t1o.pdfIn PDF document text
    • http://lg-copyrightforms.com/dream_meaning_sister_pregnant_with_twins1671a.pdfIn PDF document text
    • http://vinnipoh.fun/bevacizumab_irinotecan_glioblastoma_multiformepaxdf.pdfIn PDF document text
    • https://kisimerib.weebly.com/uploads/1/3/4/6/134697331/pawizowifigejuza.pdfIn PDF document text
    • https://kupejuzog.weebly.com/uploads/1/3/1/6/131637034/lajogu_rolamiziwidup.pdfIn PDF document text
    • https://lakubamovoto.weebly.com/uploads/1/3/0/7/130776542/2192a6ab.pdfIn PDF document text
    • http://quickpapp.online/que_es_pragmatica_ejemplosjgfav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wasupudunufol.rf.gd/what_type_of_charger_does_a_gopro_hero_3_use.pdfIn PDF document text
    • http://pukupufiribeja.epizy.com/dozumewe.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_off0000e105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE105 5500 bytes
SHA-256: 5836cbeb4d08492568e416188c51a723891e53a8ac5a6dc3339b29da216b9ac8
font_01_sfnt_off0000f3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AA 9944 bytes
SHA-256: 1294d53c426de5cfab0bb7847fcb68e3f4771b40f0b98a9702a08736e86d69f4

Open this report in the interactive analyzer, or submit your own file for analysis.