Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d560eaa97adf07…

MALICIOUS

PDF

76.9 KB Created: 2021-03-18 05:39:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d8ea0f7abf028a6b1169fc0465d0e60f SHA-1: 5cc2281da2b3eae9d609c67b485d27ed8e03add6 SHA-256: e6d560eaa97adf07528c180139189845030f50ef3a7e634a88e08f89dcf15aad
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/wix?keyword=headband+of+mental+prowess+pathfinder PDF link annotation
    • https://vewosofi.weebly.com/uploads/1/3/4/4/134493368/6134593.pdfIn PDF document text
    • http://dajexori.mypressonline.com/columbia_accident_investigation_report.pdfIn PDF document text
    • https://wavujosivisero.weebly.com/uploads/1/3/2/7/132740585/4117d20b.pdfIn PDF document text
    • https://vaxovuxaso.weebly.com/uploads/1/3/3/9/133997441/8440000.pdfIn PDF document text
    • https://nifiguxo.weebly.com/uploads/1/3/1/3/131398563/xibepuzizavepe-rogebaseforok-dejufej-woxafomoman.pdfIn PDF document text
    • https://cdn.sqhk.co/firataxoworo/hiVhcCe/logaxopib.pdfIn PDF document text
    • https://givodevivunafa.weebly.com/uploads/1/3/1/8/131871579/xazasixipisuguzo.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/hbhaijX/88781319834.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/cghgfij/6360669268.pdfIn PDF document text
    • http://lijijuzopos.iblogger.org/divinity_original_sin_2_stat_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://toduwez.epizy.com/british_airways_information_baggage_essentials_checked_allowances.pdfIn PDF document text
    • http://livirava.atwebpages.com/71829000939.pdfIn PDF document text
    • http://gizivafufet.rf.gd/91323422968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e43f3990-e70b-4185-81e9-201aab534826/kindle_fire_hd_7_3rd_generation_cyanogenmod.pdfIn PDF document text
    • http://rufupiz.rf.gd/residential_lease_agreement_california_template.pdfIn PDF document text
    • http://favigawesuwevo.rf.gd/how_to_do_keto_diet_vegetarian.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c493fcb-fbe6-486c-b9b1-de34efd4bbe0/rewifenarasa.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_off0000eca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA6 5472 bytes
SHA-256: 96705c3d13d955f10b644bb07a0d1a56e2587fd00454a983349ba34ab05c30e5
font_01_sfnt_off0000ff21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF21 11820 bytes
SHA-256: f2300280a6c9d70f913c87e096326dfca59b55a376a426d6e381add69235b4cc

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