Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ab76f80142ee0f…

MALICIOUS

PDF

75.0 KB Created: 2021-03-18 16:44:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ad70850afebf060dddc8fe93f10237ec SHA-1: 85c4aab577e5d14559e42d552b6fac348de52da8 SHA-256: e7ab76f80142ee0f72aa23cc776305cebec248eaf0f0d0ef9243a16cb96840de
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and the nature of the URLs suggest the document is designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

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://vilenefex.ru/strik?utm_term=git+command+list+current+branch PDF link annotation
    • https://cdn.sqhk.co/tozerutiwezu/gRVgf2P/fatagudaxizolipilexek.pdfIn PDF document text
    • http://galetiroxiwazez.iblogger.org/graco_snugride_30_lx_recall.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452595/normal_5ff0a5126287d.pdfIn PDF document text
    • https://cdn.sqhk.co/dasekizob/hJgghbM/philadelphia_flyers_mascot_before_gritty.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378390/normal_6044de19d5fcb.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/ghrihi2/rejamusogumi.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/aN0gcii/2nd_grade_writing_activities_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460476/normal_5ff89b1909b30.pdfIn PDF document text
    • http://rulitapalesu.iblogger.org/zupozamiwogevo.pdfIn PDF document text
    • https://cdn.sqhk.co/zowolanazew/1hiCAbj/battle_for_the_galaxy_mod_apk_offline.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416927/normal_602c04aad8351.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/7e212f9f-0f6e-4362-889d-665ffa28a307/real_analysis_book_by_np_bali.pdfIn PDF document text
    • http://pasalifadipu.epizy.com/4741498861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe4cfce-0ef6-4429-a5cf-5525e5428e5e/mankiw_macroeconomics_solutions_6th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6be10dbd-50bc-44e2-9b63-59cef37aaed8/tesla_model_3_standard_range_plus_options.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa584846-5fa4-4780-baa5-3737ac8180b3/9910504809.pdfIn PDF document text
    • http://pamanivu.epizy.com/sixasosopusojagoxanob.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_off0000e392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE392 5348 bytes
SHA-256: 7a2960bcff01caed881cfb5e1fa66ea840bb0fb9f4c70ecd73d197a05849c5d3
font_01_sfnt_off0000f58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58D 11988 bytes
SHA-256: 096b42fe95ba1892aa539c3e49c8efbcc56f425e7c2a0a0f181089a30ca53ed9

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