Malicious PDF — malware analysis report

Static analysis result for SHA-256 3494fed34f56e112…

MALICIOUS

PDF

77.0 KB Created: 2021-03-18 23:16:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0e6d84b19ac5ebf00749e56860cadffe SHA-1: 559804263df6e4d32d2a769e820aca2177d5faad SHA-256: 3494fed34f56e112e5d137f345cd101ae96b41b80612a62128dc6cba3b32c3d9
126 Risk Score

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 0.9997

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://baarspo.ru/wix?keyword=polk+audio+psw1000 PDF link annotation
    • http://kogovokuriboti.22web.org/bdo_warrior_awakening_quest_guide.pdfIn PDF document text
    • http://kabomodom.iblogger.org/the_hacker_playbook_2_github.pdfIn PDF document text
    • https://cdn.sqhk.co/puvelumilum/bhdiVKa/moxasilugexefukes.pdfIn PDF document text
    • http://jefigesawek.iblogger.org/ropodoket.pdfIn PDF document text
    • http://wixiziz.iblogger.org/bihar_masti_in_2019_bhakti_video.pdfIn PDF document text
    • http://gewewenaso.iblogger.org/which_batman_comic_should_i_read_first.pdfIn PDF document text
    • https://cdn.sqhk.co/mamidusidozu/VibHegf/nintendo_switch_online_family_plan_upgrade.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/puILfjb/audio_spectrum_visualizer_hardware.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://natireda.epizy.com/slope_intercept_form_graphing_worksheet.pdfIn PDF document text
    • http://karababeso.rf.gd/ethical_hacking_jobs_work_from_home.pdfIn PDF document text
    • http://rexivire.epizy.com/card_games_for_windows_8.pdfIn PDF document text
    • http://fomepufasele.atwebpages.com/38382933305.pdfIn PDF document text
    • http://fopagozijudiri.epizy.com/85210479940.pdfIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_2ad345a68f404092a9d6b39081cbaa2a.pdf?index=trueIn PDF document text
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_37da76d8428d442581ccb3570136ecfb.pdf?index=trueIn PDF document text
    • http://mezubivedoxida.epizy.com/dulizipiseseremume.pdfIn PDF document text
    • http://weparaxopulo.atwebpages.com/bumavabemok.pdfIn PDF document text
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_46df2347850943dc9d624dd7e32e310a.pdf?index=trueIn PDF document text
    • http://jemekovivokuvup.epizy.com/concept_map_template_for_teachers.pdfIn PDF document text
    • http://lizaduguxo.epizy.com/67973303109.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE235 4784 bytes
SHA-256: b8d79aed9aa55ac05bc48771291592b9995b9de965cdf89d92d683da8156a229
font_01_sfnt_off0000f288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF288 11188 bytes
SHA-256: f55d463d5aec9a071545dd779569c0a39ab60522c898581a671d025b9197eedc
font_02_sfnt_off000118b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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