Malicious PDF — malware analysis report

Static analysis result for SHA-256 c080a3076251355f…

MALICIOUS

PDF

88.8 KB Created: 2021-03-13 14:45:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2d4d681fa97cfc3fa8479a41d50cb184 SHA-1: 97f9f9276a2cf362ec91b26503af977af34bc5ac SHA-256: c080a3076251355f4e7ca8ea272ec07a069e95bea052402ed64d190f3019267b
126 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an external URI pointing to a suspicious domain, likely part of a lure to download further malicious content. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit vulnerabilities or trick users into downloading additional malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vilenefex.ru/award?keyword=principles+of+airway+management+pdf PDF link annotation
    • https://ragusixiseditof.weebly.com/uploads/1/3/0/8/130814169/6bc13a7740d2.pdfIn PDF document text
    • https://zokolukesowi.weebly.com/uploads/1/3/0/7/130776120/4c0df8142fb46.pdfIn PDF document text
    • https://xidozuju.weebly.com/uploads/1/3/4/5/134597445/torojug.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/61488997171.pdfIn PDF document text
    • https://titobabedax.weebly.com/uploads/1/3/4/3/134317276/gobiluwuwu-vuwurede.pdfIn PDF document text
    • http://tafuxasomup.getenjoyment.net/96291814557.pdfIn PDF document text
    • http://zijozarub.mygamesonline.org/worlds_of_history_kevin_reilly_kean_university.pdfIn PDF document text
    • https://norusukesalija.weebly.com/uploads/1/3/4/3/134356509/181aae8323ed28d.pdfIn PDF document text
    • http://vizojuzoninunoz.scienceontheweb.net/plan_y_programas_de_estudio_2011_secundaria_espaol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xojafemori/10807627623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6433fa31-1144-448a-b618-4095c7c19376/91991359711.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/fagejusof.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/xeruvalorifotakabigaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78ddecc9-a0e0-42ff-9060-046da5d04cf3/80821817126.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/pokemon_android_games_free_apk.pdfIn PDF document text
    • https://5926284e-b61c-4ed0-95e5-27b9feedd2c3.filesusr.com/ugd/50c35f_3725983c8c104307ada54efe614fe27a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/bomuvejupapalik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff0fdd77-36c9-416b-bf52-504eee39a4d9/hoover_floormate_spinscrub_800_hard_floor_cleaner.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/how_to_reset_a_frozen_kindle_keyboard.pdfIn PDF document text
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_e18cb8d188b64b05b81f9e5c18f2031d.pdf?index=trueIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_144d589385b54bd99087c59353d8b37d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8900457a-8ce1-4288-a86f-eaa4c89b09d7/when_jesus_was_a_boy_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60907c61-2cbe-43fc-8b8a-17d6f8ef7ac7/brand_identity_design_meaning.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_off00011aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAB 5672 bytes
SHA-256: 156e873dcd8e495503b872c4e2150fcfc51bc93e8eb6ffeccc10ca7fbc7dc716
font_01_sfnt_off00012df8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF8 11504 bytes
SHA-256: 25e78a7d9d952d552f3102cbd47d61643cb2acc640b35ebfa561a67e60627434