Malicious PDF — malware analysis report

Static analysis result for SHA-256 afcd26ce456d2b55…

MALICIOUS

PDF

77.3 KB Created: 2021-04-05 01:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 46da00aa0bc2e30202176849bf7d9ef9 SHA-1: 27a0c25b0bcda5ffd1483f007d5377a183f61b9b SHA-256: afcd26ce456d2b55d4faa1025dbc7ca39ea5dd9395463360c88edbe2872b2a23
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious sites. The presence of external URIs and the overall structure suggest an attempt to lead users to phishing or malware download pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/award?keyword=kendall+atkinson+elementary+numerical+analysis+pdf PDF link annotation
    • http://thedopemarketing.com/65962329295gqz0i.pdfIn PDF document text
    • http://epipog.com/battleground_advanced_graphics_tool_apkpuretkz9f.pdfIn PDF document text
    • https://cdn.sqhk.co/rogolafu/bBOWLv5/the_third_day_review_hbo.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/white_fang_of_the_leaf_kakashi.pdfIn PDF document text
    • https://cdn.sqhk.co/feletitami/gfbhhie/lakers_best_3_point_shooters_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/linaxezo/b7OcgVt/bomb_manual_version_1_espanol.pdfIn PDF document text
    • http://nemagufi.mywebcommunity.org/73143418776.pdfIn PDF document text
    • http://zozavelomidabi.scienceontheweb.net/zomevosev.pdfIn PDF document text
    • http://tejasatobes.medianewsonline.com/buxesopaxidog.pdfIn PDF document text
    • http://nakekizedexu.getenjoyment.net/17022840783.pdfIn PDF document text
    • http://straponartist.com/pharmacology_exam_questions_and_answers_for_nurses7vcwy.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/pruebas_diagnsticas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wewamamewiler.atwebpages.com/addis_ababa_city_administration_charter.pdfIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/52071155753.pdfIn PDF document text
    • https://68f06c25-eb64-4e0a-94e3-a0e33e610147.filesusr.com/ugd/463ace_72e6443f38f14756bfa95220458b08ca.pdf?index=trueIn PDF document text
    • https://e53c8fcc-339b-4d8f-83f6-44ddc8c6ace4.filesusr.com/ugd/1ea9c4_f32dab51534b46e1b2710fc9470da7b3.pdf?index=trueIn PDF document text
    • http://wejajesenopezoj.onlinewebshop.net/ps_vita_2000_us_release_date.pdfIn PDF document text
    • https://e108c0fa-8e70-4110-aab7-e0d30777705f.filesusr.com/ugd/d9966b_bfd167f1c8444a1699c6203a785eeade.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/banula/angry_birds_fight_mod_apk_revdl.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/texule.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_32d456cd99be46a8a68dccc8d5a1dd1f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/jstl_format_two_decimal_places.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_off0000eff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF7 5436 bytes
SHA-256: 6acc30394407c3d36f18dab20ddacb8e62b736f3c88cf0f7ed21169566ce2fb6
font_01_sfnt_off00010268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10268 11012 bytes
SHA-256: 7764482a77784a694ce2cf6aa7769d12b208ff24a1e652193ed607e460046500

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