Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cfe8102d4e19537…

MALICIOUS

PDF

86.0 KB Created: 2021-03-09 20:09:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5034cb42609fdb51665363d2236eda45 SHA-1: 2945a50031a059db0d61fc8cab487bedbee257d9 SHA-256: 9cfe8102d4e19537f6d8d01db4c59f5c9e23ba51b0f8bbaea50ae2a61dcf3bf8
106 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains multiple external URLs and exhibits characteristics of a link farm, suggesting it's part of a phishing or redirection scheme. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to interact with the clipboard in a way that facilitates command execution, likely to download and run a secondary payload. No scripts were extracted, but the overall structure and heuristics point towards a malicious document designed for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://druttle.ru/123?utm_term=speaking+english+application PDF link annotation
    • https://cdn.sqhk.co/livixugakuf/P5ichgg/10669273015.pdfIn PDF document text
    • https://cdn.sqhk.co/susotizakaxe/MhhAYjc/ledewugisanozinima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483071/normal_6015b6b82ca89.pdfIn PDF document text
    • http://bifovasux.22web.org/duxeke.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/6SjjsyS/44657421434.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407733/normal_60063e892fb95.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/jjgNghe/minecraft_story_mode_cast_imdb.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/fidjbgi/best_online_iq_test_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464702/normal_6012e2cccb0f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420448/normal_5fe8341247fe1.pdfIn PDF document text
    • https://cdn.sqhk.co/ludukuni/jhgieCr/sms_ringtone_download_new_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/lisakopew/MBjix58/belfast_city_airport_to_edinburgh_flight_time.pdfIn PDF document text
    • http://jowopejev.22web.org/aroma_simply_stainless_steel_rice_cooker_6-cup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_6019b7da66b82.pdfIn PDF document text
    • https://cdn.sqhk.co/dowusutitozi/fieyjhV/54601251035.pdfIn PDF document text
    • https://cdn.sqhk.co/noremixujor/jwhh0gh/age_of_empires_2_definitive_edition_historical_battles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_602c77eba040c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gowuzabe.epizy.com/sanidry_cx_dehumidifier.pdfIn PDF document text
    • http://pojoviraxerojo.myartsonline.com/33052906010.pdfIn PDF document text
    • http://timerojulawu.myartsonline.com/lalosuwenefafufexegagov.pdfIn PDF document text
    • http://dikawixum.epizy.com/relaxing_instrumental_music_ringtones_free.pdfIn PDF document text
    • http://jagomizaf.atwebpages.com/age_of_empires_2_no_cd_crack_2.0a.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/sennheiser_xsw-d_lavalier_set_digital_lav_wireless_system.pdfIn PDF document text
    • http://gifidabula.atwebpages.com/begikufafebubodotug.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_off00011252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11252 5268 bytes
SHA-256: 9f21c74d677e8b31105ee625d7510d99ce7e71cb326c1f3e8b405a419c6ec04e
font_01_sfnt_off00012442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12442 11404 bytes
SHA-256: 358efa45497ce1de1e2d5895d5207527b5c4fc38690eba5f58c152c36390ee1e

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