Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab5cdab60051dd92…

MALICIOUS

PDF

85.6 KB Created: 2021-06-07 11:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6474e9d143e387e7179f26b75b5f2170 SHA-1: 0497a554c161b125048adade7f5a82bb5d91c414 SHA-256: ab5cdab60051dd920c8839eb08d263fb113749523cedac39c40c40277af77729
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the PDF structure itself are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pixomot.ru/pbw?utm_term=%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D0%25BF%25D1%2580%25D0%25B8%25D0%25BB%25D0%25BE%25D0%25B6%25D0%25B5%25D0%25BD%25D0%25B8%25D0%25B5+%25D0%25BC%25D1%2583%25D0%25BB%25D1%258C%25D1%2582%25D1%2584%25D0%25B8%25D0%25BB%25D1%258C%25D0%25BC+%25D0%25B4%25D0%25BB%25D1%258F+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425238/normal_600a93816af3d.pdfIn PDF document text
    • https://jatufabafalili.weebly.com/uploads/1/3/1/6/131637938/tagani-fedowa.pdfIn PDF document text
    • https://pururejipe.weebly.com/uploads/1/3/4/2/134265449/vamena.pdfIn PDF document text
    • https://rujedupexiveviz.weebly.com/uploads/1/3/4/8/134874221/80b041407718271.pdfIn PDF document text
    • https://nixoferijoxe.weebly.com/uploads/1/3/4/3/134373865/4712438.pdfIn PDF document text
    • https://bapanezuginu.weebly.com/uploads/1/3/5/3/135310050/9699547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374362/normal_60637194d8c90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379856/normal_6058e979dcfbb.pdfIn PDF document text
    • https://xoniwolujejusun.weebly.com/uploads/1/3/4/4/134456196/xupikezi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423732/normal_6049e6945acea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501963/normal_605cb0b87bdfd.pdfIn PDF document text
    • https://dijemafewume.weebly.com/uploads/1/3/5/9/135992897/5158430.pdfIn PDF document text
    • https://pozemake.weebly.com/uploads/1/3/0/7/130776760/gasegeneru.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://uploads.strikinglycdn.com/files/fe503837-2518-440d-b915-e84e7112dd7f/modelo_contrato_de_arrendamiento_apartamento_bogota.pdfIn PDF document text
    • http://fotikeralo.pbworks.com/w/file/fetch/144759567/25760972481.pdfIn PDF document text
    • http://vajaxasave.pbworks.com/f/96039946613.pdfIn PDF document text
    • http://xibosini.pbworks.com/f/how_to_get_free_coins_in_homescapes_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b4ecc34-f421-4811-bb82-72d386cf3258/vegesej.pdfIn PDF document text
    • http://larabefejaji.pbworks.com/w/file/fetch/144483864/office_cleaning_checklist_template_excel_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98a64d24-7a38-4c06-a34d-d450dc26c87e/how_to_do_chest_flys_with_resistance_bands.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14502a7d-746b-437a-ac6d-83c757b1f736/what_is_the_default_password_for_nortel_voicemail.pdfIn PDF document text
    • http://fepazonavu.pbworks.com/f/dijogarer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b32fda9-eba5-48fa-bce9-908359f6fbbf/lola_and_the_boy_next_door_quotes.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD21 6100 bytes
SHA-256: 0f6f4d5020186412dcd8beeb139f11598c5bc9ebf9bc856d3d4ec3176decf001
font_01_sfnt_off0000f111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF111 15768 bytes
SHA-256: 4f23dee0d69b44e1b8f89f9b80dc26b7283a360f6334d3ebbb088d93694d14f9
font_02_sfnt_off0001221f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221F 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
font_03_sfnt_off0001374f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1374F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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