Malicious PDF — malware analysis report

Static analysis result for SHA-256 b607492d5c646e55…

MALICIOUS

PDF

84.6 KB Created: 2021-04-27 21:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 58b20c3f8b2e02ec044245b397f756c8 SHA-1: 969e0668910cb2596141a05ae049a10f6ed8a41a SHA-256: b607492d5c646e55f92f07462db10bba15f7437fdc2878c415628fa080b8019a
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The presence of PDF-specific heuristics suggests exploitation of PDF vulnerabilities or malicious content within the document structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://botokaw.ru/strik?utm_term=how+many+red+cards+are+there+in+a+pack+of+52+cards PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387406/normal_5fe00b09167d7.pdfIn PDF document text
    • https://cdn.sqhk.co/pakebisas/hfuzuhc/no_one_escapes_cidhna_mine_not_starting.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458856/normal_5fd8b8e14512b.pdfIn PDF document text
    • https://cdn.sqhk.co/samidabaxik/jhhigge/restaurants_near_horizon_drive_grand_junction.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383449/normal_6054f04d99fb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420917/normal_603da5d985f75.pdfIn PDF document text
    • https://cdn.sqhk.co/pamezuravuno/oEijYtQ/best_free_weather_radar_app_ios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454559/normal_6051eabaaf4cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://12a3aa02-022d-4218-8efb-90aa4388683d.filesusr.com/ugd/6dfd9b_f6493feb3e9e4ab79170a1d9eb3ef60a.pdf?index=trueIn PDF document text
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_5d496d6c81f242f38e9981f9cfd0f287.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c62b75-60c4-4361-9679-343ff5c53267/fifty_shades_of_darker_grey.pdfIn PDF document text
    • http://tubasip.epizy.com/arbaeen_nawawi_arabic.pdfIn PDF document text
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_274ad77d3143499bb07da752fb3782de.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca10523c-0a4d-4325-8528-89e461bed90a/tools_used_by_program_managers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5347d4f1-a786-4744-94fa-2df856d1404a/90158026184.pdfIn PDF document text
    • http://gazezubutajon.rf.gd/wibadolojopalabapoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07029127-b6ab-408a-bb03-c51f0f54b314/49097166493.pdfIn PDF document text
    • http://dokubuxopid.rf.gd/bowofizunurovazifos.pdfIn PDF document text
    • https://a6668164-4238-4e0d-addb-cc4c62f58fca.filesusr.com/ugd/2dfcca_0885ecda5a584e748df75c2003a93e77.pdf?index=trueIn PDF document text
    • http://suvofaga.rf.gd/malayala_manorama_calendar_september_2020.pdfIn PDF document text
    • http://fuvituze.epizy.com/19248911889.pdfIn PDF document text
    • https://acfcda0b-1795-4b40-aedc-9a0bc13047ce.filesusr.com/ugd/89c6ad_e9716ae4eb094c7589cbdaa7b4e348b8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b3a2fa5-75b5-4cf0-829f-1f1dce64c09d/josefoda.pdfIn PDF document text
    • http://jarunotaso.rf.gd/material_requirement_planning_process.pdfIn PDF document text
    • http://pinakebe.rf.gd/mhw_longsword_advanced_guide.pdfIn PDF document text
    • http://wutagokavejeve.rf.gd/checkpoint_endpoint_security_vpn_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1B 5628 bytes
SHA-256: 79e864e77d392017a42e6c95aba9b010044be74496a6baf731105457a9872e9d
font_01_sfnt_off00010f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F29 11304 bytes
SHA-256: 062316dc812f5ad26c7e61bb474e2b75933dd4be5d3fc9c923888d06ef154c10
font_02_sfnt_off000135bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135BC 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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