Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e609d20f88062f1…

MALICIOUS

PDF

80.7 KB Created: 2021-04-05 19:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ec0391e783143e817891712c9bae4584 SHA-1: 54b8650455a86ec49ff022b763d87ac15d0b50b9 SHA-256: 6e609d20f88062f1f3d9af8cf99188fefa2d52308eec52b78ea60dc466d97959
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 0.9992

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://xajibur.ru/123?utm_term=adrenalized+operation+exodus PDF link annotation
    • http://form-lnstagramverificationbadge.com/99077935394hqwcw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426942/normal_5fe5c661677db.pdfIn PDF document text
    • http://znohist.site/527502503996x1st.pdfIn PDF document text
    • http://vajesafosedepur.mywebcommunity.org/pimapole.pdfIn PDF document text
    • http://abanca-electronica.com/64354894216zqgzr.pdfIn PDF document text
    • http://gezinuduwep.medianewsonline.com/exercices_orthographe_cm1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421329/normal_5fde42008f3aa.pdfIn PDF document text
    • http://zarewubizeno.mywebcommunity.org/guitar_scales_and_arpeggios_grades_6_8.pdfIn PDF document text
    • http://jojazinex.mygamesonline.org/81248229325.pdfIn PDF document text
    • http://introdom.ru/kettering_ohio_police_accident_reportssx4d4.pdfIn PDF document text
    • http://bufo.online/wanurazsw0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426408/normal_60154ae465b10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/27559157583.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/38021206313.pdfIn PDF document text
    • http://vebusatoro.atwebpages.com/xupalusavijojidanavilelo.pdfIn PDF document text
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_b53011e153984bf7904eab023bf8c981.pdf?index=trueIn PDF document text
    • https://492f55f4-3442-4b37-b17e-39d9f2f0ae8a.filesusr.com/ugd/7dfe85_f913889411834192a8f2a741a346d922.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/levovod/voice_recorder_app_install.pdfIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_263baf1e166d49349463869a37948a35.pdf?index=trueIn PDF document text
    • http://tutanimonuwodam.epizy.com/addams_family_musical_full_score.pdfIn PDF document text
    • http://zoloxufiz.epizy.com/sanosedunuv.pdfIn PDF document text
    • https://c1ab63b4-4781-4901-abeb-f581ed41d26f.filesusr.com/ugd/b44917_74f19955ceca44a889fba5965c8fe1be.pdf?index=trueIn PDF document text
    • http://piboladofa.rf.gd/aptitude_test_mcq.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_off0000fca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA2 5060 bytes
SHA-256: 15d2ebed4447b2dbe93f4f7559d3e8a70550338026d920dbdbbff05207d3cfcf
font_01_sfnt_off00010dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEE 11576 bytes
SHA-256: 4e767e86e5a5f11c3fe052183dbd3665f4f463588751e8aaaaa70ea1828972c9

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