Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7c3c4655b14e45…

MALICIOUS

PDF

67.2 KB Created: 2021-03-16 12:49:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dc564801a1178931b3f6664500a13a63 SHA-1: 5e7b851dd8a161765eea067676083d014f9e9996 SHA-256: db7c3c4655b14e458c840e50e0999a73b80ae8e192ca85a1d7a38bc8c8418f88
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 0.9997

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://gimoguvi.ru/123?utm_term=janatha+garage+video+song++mp4 PDF link annotation
    • https://cdn.sqhk.co/nitagalut/hdfljcQ/35013985375.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/papelito_calligraphy_workbook.pdfIn PDF document text
    • http://fisukebisogovi.22web.org/pexefivegikulim.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/dftuClt/aafes_pogs_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/zolaxadivowe/cghggie/telegram_and_gazette_subscription_rates.pdfIn PDF document text
    • http://riwuvodobopexu.mywebcommunity.org/materiales_aislantes_y_conductores_de_electricidad.pdfIn PDF document text
    • https://cdn.sqhk.co/pazibafax/YhdNnd5/video_editor_add_music_online_free.pdfIn PDF document text
    • http://fibubomalinod.22web.org/asking_direction_worksheet.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/comparative_superlative_games.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/61435917930.pdfIn PDF document text
    • https://cdn.sqhk.co/wugoxoxowex/gT2Jhcv/country_top_40_radio_host.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c3652f0-048a-4a60-ad35-4671c50df4af/what_is_a_curriculum_based_assessment_in_special_education.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/jopusone.pdfIn PDF document text
    • http://xusoromi.epizy.com/circleci_android_setup.pdfIn PDF document text
    • http://kojenixerog.myartsonline.com/8807240123.pdfIn PDF document text
    • http://xojapenekoxij.rf.gd/how_much_does_rafael_nadal_worth.pdfIn PDF document text
    • http://wazeniwemir.onlinewebshop.net/sugesatorefewibilakidebe.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/24717657354.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/what_is_the_contrast_principle_of_perception.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df235db7-d1aa-42c3-b174-1b5a4b6124e5/41823454050.pdfIn PDF document text
    • http://zupitatip.atwebpages.com/23716037489.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA07 5480 bytes
SHA-256: f79c796573504e4ec5cefe16b8d9ea1cc71c23e60a68fb3fcadc81c40c51ae71
font_01_sfnt_off0000dc8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8D 10452 bytes
SHA-256: b11efaa5bfe4a25f5897c1a4fa4e19d6b05f7d318ae02865c2ff25b4f9567f29

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