Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d82578c402b7d8…

MALICIOUS

PDF

78.3 KB Created: 2021-04-11 21:51:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f09b4c22906d708a63c27b59f6d2deb4 SHA-1: 565e1ff393167ddd2df3ba1e86f6b5dfcee09098 SHA-256: 94d82578c402b7d8b0a4221876deb4a50141b7191003d0b506eb6f4ab004bf44
166 Risk Score

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. It uses a password-protected-archive lure. 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 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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+to+program+a+radio+shack+scanner+pro+51 PDF link annotation
    • http://samozanyat.info/wufinswl5w.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/jfmgfk4/destroy_stuff_in_minecraft.pdfIn PDF document text
    • http://form-lnstagramcopyrightservice.com/26889148233h1tdh.pdfIn PDF document text
    • http://stal-kemerovo.ru/yellowstone_national_park_volcanoslw4l.pdfIn PDF document text
    • https://cdn.sqhk.co/dubibuwa/vjdZ1um/88215473640.pdfIn PDF document text
    • http://euroshopmn.space/redhead_safe_weightedc2k.pdfIn PDF document text
    • http://onenature.space/oral_lichen_planus_case_reportuamdr.pdfIn PDF document text
    • https://cdn.sqhk.co/gatezoru/hcjewhg/86228975094.pdfIn PDF document text
    • http://remastacer.com/m-audio_keystation_49e_how_to_usenimao.pdfIn PDF document text
    • http://kulinar2020.site/ratio_de_couverture_des_capitaux_invvzl3m.pdfIn PDF document text
    • http://antonioita.fun/56763578303wqj5a.pdfIn PDF document text
    • https://cdn.sqhk.co/vukebomuwan/vhd4ohi/84317926507.pdfIn PDF document text
    • https://cdn.sqhk.co/pawekenu/1njhTgd/96100401454.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1b53f64c-3596-40ff-86ea-95cec8902569.filesusr.com/ugd/838e7e_a78d2ccbe6894bafa163166b8cfce7ad.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/77b19a28-e269-48a1-8eb2-8f0dd7526df0/health_care_delivery_system_in_india_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e6c24d9-5489-4ca3-a967-f9dd40481432/smokey_mountain_smoker_manual.pdfIn PDF document text
    • https://30d6ba4c-d201-4e26-8f31-a0e059b28788.filesusr.com/ugd/f9b8bb_de4f66b8092040fab5d55de25778d699.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/sql_for_mac_free_download.pdfIn PDF document text
    • https://4c38db24-2924-4bf2-81c9-04860d987a69.filesusr.com/ugd/a68d8f_9d59ff8579f54d57a213faabf28f2479.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7538dbdc-e801-4e18-ac5c-b2e5a7203360/australian_standard_as_nzs_iso_31000_risk_management_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/brother_pt-h100lb_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/hl-3170cdw_series_default_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f4931d8-a667-4d43-9ada-a7103421280e/96701993288.pdfIn PDF document text
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_aa166826da644f9fb9f2b341628fa884.pdf?index=trueIn 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_off0000f1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C3 5748 bytes
SHA-256: c0f81f8cd54f96414af66f351f82390deb34d6fd1662b29956dc8a512202d7ff
font_01_sfnt_off00010541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10541 11216 bytes
SHA-256: 1e40f510d13afd4ad1fe7e6a61a484a2e19c9baf4c73a1592e29f593af99bbc6