Malicious PDF — malware analysis report

Static analysis result for SHA-256 a360fa65f0b4baf7…

MALICIOUS

PDF

77.6 KB Created: 2021-04-04 16:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 848c7c3b32455643e3bc9b406843d8a3 SHA-1: 0ada7dcb56ecd2a30c0443d0178c0b0abc259ab2 SHA-256: a360fa65f0b4baf7e2c04e32d1fcc8d2fcb0891ac60ffaf537444d399248eb38
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded links, many pointing to unknown or potentially malicious domains, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by identifying the document as a link farm on disposable hosting, designed to redirect users to various external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/award?keyword=causas+de+oliguria+pdf PDF link annotation
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://wopebexe.66ghz.com/87583367717.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/wuwosepobixomerxm8sp.pdfIn PDF document text
    • http://vawojumu.22web.org/what_are_the_elements_of_effective_writing.pdfIn PDF document text
    • http://world-wildshop.com/jujizisifijesejupulu1s9cw.pdfIn PDF document text
    • http://wersita.space/gitowosalelamaftksz0.pdfIn PDF document text
    • http://gikadoketu.iblogger.org/androidhive_sqlite_database.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/bba45511-54cb-4344-be4e-ebb0931283ee/2004_dodge_ram_1500_5.7_hemi_engine_for_sale_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6ce6362-0c3f-4801-ab4b-255d4d47e2a3/2004_dodge_ram_1500_headlight_bulb_replacement.pdfIn PDF document text
    • http://xorosobodudirug.rf.gd/equation_solver_app_for_android_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3618f8e3-ca5c-4174-b099-b3ac05dadcb5/what_does_msm_do_for_body.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08b69e71-5caf-42cc-bce6-3457dbb8b8dd/what_do_mean_by_security_analysis.pdfIn PDF document text
    • http://jumazimedu.rf.gd/hydraulic_bending_machine_project_report.pdfIn PDF document text
    • http://fiderifi.rf.gd/53877119618.pdfIn PDF document text
    • http://xutetutadipuvux.rf.gd/wilobinupaxowiku.pdfIn PDF document text
    • http://xejojud.epizy.com/58972281990.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb13f786-56dc-4a28-b276-a2db02473bc7/64378228966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33dc5c40-0fe5-4ba7-89e5-07dee9e0e4eb/mosuwavonoziluzumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1918a4c1-96b0-4b4d-bb0f-cca16df0922f/kugasowejumigudo.pdfIn PDF document text
    • http://gewekerob.epizy.com/begrijpend_lezen_oefenen_groep_5.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_off0000f20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20C 5112 bytes
SHA-256: fdbd13b8ac70279a1143008acad588cd5956dbd67e7d4cf6c17fd882d0eacf31
font_01_sfnt_off0001037c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037C 11252 bytes
SHA-256: a3e367a21534c3b30958f79eedfc1c51968add13475f2e287ab9ce074ed12bec

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