Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97395ab7322baf5…

MALICIOUS

PDF

81.1 KB Created: 2021-03-22 23:16:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b6776914c72ca7d1f0d370ca8b3726ae SHA-1: 8875708e8c4e16994dc858d5ea576945eb9330f6 SHA-256: f97395ab7322baf5809660d15fbbe4c8f1f90f8339cb255b7089e93e7bc33fff
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 0.9996

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://golowaki.ru/award?keyword=amazon+web+services+in+action+second+edition+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383475/normal_5ff06d4f4cfbe.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/gjghRNQ/car_driving_games_free_download_for_windows_xp.pdfIn PDF document text
    • https://cdn.sqhk.co/jufenakajo/bZjgVji/fox_deportes_en_vivo.pdfIn PDF document text
    • https://cdn.sqhk.co/mifopanikil/QJhdhbo/lujevupanewo.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvesanap/cacjeq1/fanatical_basketball_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/febenapox/cghgiii/95289564547.pdfIn PDF document text
    • https://cdn.sqhk.co/zenujulikik/ArGf1gf/sokavakegisivof.pdfIn PDF document text
    • https://cdn.sqhk.co/jizuxadif/cDgjjiR/download_citra_3ds_pro_apk_cracked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379970/normal_5fd7120f57ecc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452217/normal_60473c220c3ec.pdfIn PDF document text
    • https://cdn.sqhk.co/kojagopomon/jdgdo4A/16985441617.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426815/normal_601d29dfe9e9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381962/normal_603ec47360785.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kaxukok/tometuxuxugizagovesu.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/after_twenty_years_by_o_henry_character_analysis.pdfIn PDF document text
    • http://burupopevetu.rf.gd/pdf_viewer_handler_outlook_error.pdfIn PDF document text
    • http://tovezujatim.rf.gd/is_almond_milk_on_21_day_fix.pdfIn PDF document text
    • http://wevaxelim.rf.gd/1647435905.pdfIn PDF document text
    • http://wubezirinipo.epizy.com/26196527231.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/rilas.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/sulasosunaparewefosag.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/vegowukuraruz.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_off0000fadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADB 5600 bytes
SHA-256: 9c700dcd7c449787611afa0cf9c7ffdf2a02e0e3c546822ddb6b5b29f4dcdcc6
font_01_sfnt_off00010de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE5 11360 bytes
SHA-256: 77339370fd36b7c3482034ce6a5b08f06fb3fcca5f81ec7f020f3c99e19e9f2a

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