Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea4e5e4920820a0…

MALICIOUS

PDF

84.5 KB Created: 2021-03-21 21:13:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fd527272fc07662f6115f8b3888e3a8d SHA-1: 93f336ab020a914f6e5e2535754d2aba13234ae2 SHA-256: 4ea4e5e4920820a031d647b1b38cf499066e35d1795b2b9dcce202080f36c167
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 0.9998

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://maypoin.ru/wix?keyword=is+tickpick+legit+2018 PDF link annotation
    • http://jarevine.mywebcommunity.org/gametogenesis_file.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403408/normal_6025b027e4157.pdfIn PDF document text
    • http://pogibofabut.getenjoyment.net/critical_appraisal_of_a_journal_article_ucl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387825/normal_60535e7ec2a74.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/13527238653.pdfIn PDF document text
    • http://rabizepafuxonag.mypressonline.com/11903540648.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/22289425-6b01-4e69-a302-72f0edd3e434/what_is_ibn_in_arabic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb11fb23-0a54-4a64-9621-498a30c5f212/used_ft-857d_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0deefd7-11cc-457a-abd4-9d280994bc9a/washing_machine_cleaners_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/91995651543.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/red_dead_redemption_2_hunting_guide_map_online.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/alta_sierra_snow_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6227ca1-0f8b-4320-a4d4-9ff21bc143e8/lofepinofasutovite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d30cdda7-7018-4a51-a9f3-ae2fc818152b/what_should_be_included_in_a_treasurer_report.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/ahle_hadees_namaz_ka_tarika.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/xutijalovepadakub.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/la_belle_au_bois_dormant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82405f39-7aa2-4d43-a99a-d00276ad8b75/31504132118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b07133f1-c8c7-494d-8703-852a19e1c5e0/xuritifikugitisokoti.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_off0000faee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEE 5316 bytes
SHA-256: 8be4604b6dfc01ed4f25621c6d0719e455ad2de578d507bd0dd1a85f8b80c117
font_01_sfnt_off00010d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2A 2536 bytes
SHA-256: 17f9c434be76b485df9bda451b8203c93c381154abc1b1a3c99bdbecb50127a9
font_02_sfnt_off00011814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11814 13352 bytes
SHA-256: 3d1a30e2dab1f100eb07d3fc0e03805efebd9b6e6e55e4f24ded3a121fa0d578

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