Malicious PDF — malware analysis report

Static analysis result for SHA-256 659add6f8ec68838…

MALICIOUS

PDF

74.6 KB Created: 2021-03-15 18:01:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 30a81ef0e3f3e1277508abd846d8aff2 SHA-1: a82fd96f1c94c2731deeac9f132f02d1ce06193d SHA-256: 659add6f8ec6883856edc1190be693caef90f90c55541e922dd5cdc3f3e6cb18
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-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://dafemum.ru/123?utm_term=boomerang+tamil+movie+scenes PDF link annotation
    • http://freefire-gifts.com/basel_norms_noteso45ti.pdfIn PDF document text
    • http://cyberghost.store/bhajan_ringtone_2018x1lg6.pdfIn PDF document text
    • http://femovanisom.iblogger.org/zafexega.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454808/normal_604151beda518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_60123ba4da92b.pdfIn PDF document text
    • https://cdn.sqhk.co/ramojezi/Dhihgij/glass_break_wallpaper_hd.pdfIn PDF document text
    • http://slmit.space/kotor_jedi_classes_guide933q0.pdfIn PDF document text
    • http://auto-fishing-rods1.club/costco_food_court_nutrition_chart4qk7g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381737/normal_600b8ea5cf7d8.pdfIn PDF document text
    • http://hdsamara.ru/79948460299xhlgy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392872/normal_6033ea6251927.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/wT11jfC/2954434830.pdfIn PDF document text
    • http://fastdonwload.space/nekatelolubumimixerimejaxalp8r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://didefiwofiko.rf.gd/tipos_de_fichas_electronicas_ejemplos.pdfIn PDF document text
    • https://f1801c53-b3f5-4b94-a9b3-4bb8eb376a66.filesusr.com/ugd/af633f_b5e8ab0351dd45a5849575ffb5ad4c03.pdf?index=trueIn PDF document text
    • http://ruxopagotar.epizy.com/72610387471.pdfIn PDF document text
    • http://kobuxotaregudes.rf.gd/bit_mesra_bca_application_form_2018.pdfIn PDF document text
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_e20f8bf411fe4cc6a0f46358022d1ede.pdf?index=trueIn 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_off0000e47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47A 5228 bytes
SHA-256: 2347d5230269311d10621f490230283b0790e122a88eb70087840b707267f33a
font_01_sfnt_off0000f638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF638 11116 bytes
SHA-256: 04b3fbca39521a05f8286c0bada353a7957bcc824aeaf53edd93065a70d3d0da

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