Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae02c4861facecc…

MALICIOUS

PDF

90.2 KB Created: 2021-04-05 14:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 16b13efbccd3cfbf192b42132728bb84 SHA-1: d29dfe23811b5ccb59f985eba74030257b5230da SHA-256: fae02c4861faceccbcc554a1d2a24b7068c7e299d9d564c5e976eb610edd23a1
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 or suspicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of external URIs and link farm characteristics suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://vilenefex.ru/strik?utm_term=amplificadores+de+potencia+clase+ab+ejercicios PDF link annotation
    • https://cdn.sqhk.co/lipepolutew/D0cigYu/febezuwotudomadipixow.pdfIn PDF document text
    • http://tapodozinojet.mypressonline.com/avatar_kyoshi_book.pdfIn PDF document text
    • http://mavixepajifulem.scienceontheweb.net/banking_awareness_affairscloud.pdfIn PDF document text
    • http://erogan-oficial.site/dafobadupu9d86g.pdfIn PDF document text
    • http://geniusenglish.space/kusabatuxinadjk64j.pdfIn PDF document text
    • http://bigops.fun/sibidayx626.pdfIn PDF document text
    • http://eu-study.ru/60041883231tovov.pdfIn PDF document text
    • http://sifuzifixezija.medianewsonline.com/tiempo_de_degradacion_del_plastico.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/Y1gghgq/88514493818.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/pirate_king_game_free_spins9xfby.pdfIn PDF document text
    • http://wukosemat.22web.org/xiwegawilujidulikinixal.pdfIn PDF document text
    • http://dkmz3.club/975105513bj2ws.pdfIn PDF document text
    • http://shtangennstutkupitseychas.xyz/chicago_weather_monthly_accuweathered6fj.pdfIn PDF document text
    • http://italy50wow.pro/irritrol_rain_dial_9_station_outdoor_controllerq0m2b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bidejepeko.onlinewebshop.net/jezejidaredudevadari.pdfIn PDF document text
    • http://domuromu.atwebpages.com/1183274875.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/subtracting_fraction_with_unlike_denominators_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/madakafokakevadujazadel.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/the_things_we_do_for_love.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/tofawekifetivazapevegir.pdfIn PDF document text
    • http://donopopasuxek.epizy.com/kadobenerodofinawewar.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/gikovosepu.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_off00011109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11109 5292 bytes
SHA-256: 71a11bec62322d815dbf25e3a8f36a748704f3c442fe1f2bac15744fc9411ef6
font_01_sfnt_off000122e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E4 12360 bytes
SHA-256: 55e3521f5c68add069e40d3f1e8c42cefcc70db4753c34d8ceef9a44ef8e8412
font_02_sfnt_off00014ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AE8 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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