Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23c1ec8be7afd9f…

MALICIOUS

PDF

82.9 KB Created: 2021-03-05 13:11:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f93278356b81051534e4cfa8f3a83fd5 SHA-1: f49a081169c05455f14f2c6b56761dde39aa1e6c SHA-256: d23c1ec8be7afd9f4f6b9636df8b16ce3f3225cf1ea550350f8d4a7ab260c79c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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/wix?keyword=hmong+clothes+drawing PDF link annotation
    • http://interbank.link/reading_detective_b1blru2.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/56340678214.pdfIn PDF document text
    • https://cdn.sqhk.co/keximovib/jcmgdeg/zed_tft_set_4_items.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403685/normal_6007c236e01b7.pdfIn PDF document text
    • http://ptmonline.ru/385042670112lhxy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402486/normal_600c1bdb9e088.pdfIn PDF document text
    • http://rijewomel.scienceontheweb.net/726213122.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/cp5hiZl/96524325845.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/shaded_cream_long_haired_mini_dachshund.pdfIn PDF document text
    • http://alcexpress3.xyz/macbook_cannot_format_sd_carde2qs7.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/jazghmo/hitmasters_game_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389603/normal_600772453ed84.pdfIn PDF document text
    • http://centerbluebadge.com/space_maintainer_indicationsia7wl.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/OidzO8Y/piano_keys_games_to_play.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/h0jfghH/redazubesulavixaminotor.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/gdogjic/lateloxiloveramufor.pdfIn PDF document text
    • https://cdn.sqhk.co/kamozipu/3jhVig7/evacuated_tube_system_materials.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/0njhhcz/boo_s_door_monsters_inc_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/hjqicXB/play_checkers_board_game_free.pdfIn PDF document text
    • http://liketime.online/berlitz_english_test_answersmxt3k.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/ihbhjNP/fifa_world_cup_2022_qualification_groups.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pozijirume.rf.gd/2_column_research_paper_template.pdfIn PDF document text
    • http://posijibanif.epizy.com/vagoxajomulirurakutadinem.pdfIn PDF document text
    • http://rixigor.onlinewebshop.net/6750071894.pdfIn PDF document text
    • http://gafodix.myartsonline.com/health_economics_review_journal_impact_factor.pdfIn PDF document text
    • http://rufuregebedus.rf.gd/trig_cheat_sheet.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_off000106f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F5 5408 bytes
SHA-256: 870e2034578fb92fc1030d7e6b75f8c26ba9e781cfa9de941acb59c15578eca7
font_01_sfnt_off00011938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11938 10652 bytes
SHA-256: 09a8647838c57ef39dbc676cd7daf2c1297ec5466a545439dfe30583380fbc2c

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