Malicious PDF — malware analysis report

Static analysis result for SHA-256 67abc1990afcf428…

MALICIOUS

PDF

66.8 KB Created: 2021-03-15 21:32:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: af99e8aa648a6fedb0a0df1dc84e0f7c SHA-1: 3e51fa5a3422cbf09a72b4e4fbd328f32db63ae5 SHA-256: 67abc1990afcf428b5bcad18e781d93b94ea0cc5ee686cbc4e4101c408f7e3e8
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://dafemum.ru/wix?keyword=magellan+retreat+tent+instructions PDF link annotation
    • http://hushseo.online/zatenabaejv18.pdfIn PDF document text
    • http://fosonelotila.medianewsonline.com/best_love_quotes_for_her.pdfIn PDF document text
    • http://itsamorem.com/the_corporate_culture_survival_guide_scheinysdr2.pdfIn PDF document text
    • http://bimoriz.getenjoyment.net/how_to_build_a_website_from_scratch_wordpress.pdfIn PDF document text
    • http://supernefritroller.xyz/oasas_justice_center_reportingop820.pdfIn PDF document text
    • http://psylath.com/bojalagoxewar2g6t.pdfIn PDF document text
    • http://tinonijo.iblogger.org/60549047374.pdfIn PDF document text
    • http://podarokinsta.site/minions_full_movie_360pfqek9.pdfIn PDF document text
    • http://redirunna.xyz/bewovasirewupefujuwomobep2trxc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luturuwuxas.epizy.com/5537_photoresistor_datasheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eda8840b-3e31-4b5b-ad76-76058288d7f5/37063192271.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/excelsior_springs_community_center_trunk_or_treat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a02ad7ca-e91e-40f1-9ae3-fd991cc05d14/93486029699.pdfIn PDF document text
    • http://vitewunidamol.epizy.com/platero_y_yo_texto_completo.pdfIn PDF document text
    • http://texokobatogu.epizy.com/sutejanipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14fdf6b1-6a38-44cd-bcb3-ca5ef1973360/the_fighting_ground_full_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed99de16-5b49-4759-9268-6e5088116c15/79636951335.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_off0000ca40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA40 4972 bytes
SHA-256: 6e288c325237d9009468b85f88d49443c9acc965142ef78f96ce7d337db6ed88
font_01_sfnt_off0000db45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB45 10224 bytes
SHA-256: 2a4620610fd13225db56f969fb01db483d6d7752465257e26152259ca9039e24

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