Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec59abed4986a382…

MALICIOUS

PDF

90.5 KB Created: 2021-03-26 05:36:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 9c83d73bd396f8db3f9ac1a17d72b628 SHA-1: abf3ba1b2100d6e044b4f22d4e3657e798841061 SHA-256: ec59abed4986a382344cc497d86446472f57a5e43fc4062d66eadba34e78cfff
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=technical+drawing+application PDF link annotation
    • https://cdn.sqhk.co/rukububibon/jfhbSih/copperplate_handwriting_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopiroxab/rgfRjey/couch_to_5k_android_app_free.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/kafitubevomil.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/dLKEgiM/meet_me_application_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wefadegese/iBDQ0Mq/free_fire_squad_battleground_survival_game_apkpure.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/tebonakesawo.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedimuwo/xKijjcO/riguzomizikaronofisatu.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/Dgjugfj/yokohama_tires_review_consumer_reports.pdfIn PDF document text
    • https://cdn.sqhk.co/kemivabesu/f2H4ght/.pdfIn PDF document text
    • https://cdn.sqhk.co/jisokemefaz/Oijficy/25646939978.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/9fjjjGk/o_launcher_2020_prime_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/QhhErij/2340727280.pdfIn PDF document text
    • http://allerlo.xyz/xodenebgnyz8.pdfIn PDF document text
    • https://cdn.sqhk.co/piwizogir/Riijdij/balal.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/iay93ij/purofekogodejafumep.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/69993402207.pdfIn PDF document text
    • http://vawadofofasip.getenjoyment.net/arte_bizantino_resumen.pdfIn PDF document text
    • http://sujimelowakolop.medianewsonline.com/labenulagowezoj.pdfIn PDF document text
    • https://cdn.sqhk.co/tunaluvum/jihjhgK/fukofawu.pdfIn PDF document text
    • https://cdn.sqhk.co/nijijitolow/a8Pchhx/34121046345.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/ifgdH50/sebefaduzamokomexolig.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/jeW8VZX/can_you_escape_the_room_ix_level_46.pdfIn PDF document text
    • http://batmbatm.ru/complete_chemistry_app_apkcytmc.pdfIn PDF document text
    • https://cdn.sqhk.co/gixotagokezu/NhbOjco/biodiversity_meaning_in_urdu.pdfIn PDF document text
    • http://nuverlites.online/universal_usb_audio_driver_mac2y31i.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/9jjqzRg/rowilizagidibu.pdfIn PDF document text
    • https://cdn.sqhk.co/lolitubafo/WUif4gd/idle_defense_dark_forest_redeem_code_2020.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://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_off000113c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C6 4984 bytes
SHA-256: 983ebbf1239039d8bd61901ffa3ed5af5395d1a8ee8617de3e7e137c068cee5a
font_01_sfnt_off000124b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B4 13184 bytes
SHA-256: d4c046782b112186ef250c8672b0c67ac64155b45a4077482fa90600768d0958
font_02_sfnt_off00014e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E3F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3