Malicious PDF — malware analysis report

Static analysis result for SHA-256 83e66c466943ec59…

MALICIOUS

PDF

97.0 KB Created: 2021-03-27 12:12:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: fcd6e314851e7da2441e028bdf4ea92c SHA-1: a742db3f8cb3fa5772762508d6b0c6517d274796 SHA-256: 83e66c466943ec5966b19cd8c4ee5f018143b6b9e6e9d54f813658203d73490d
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 for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate an attempt to direct users to potentially harmful external sites.

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://botokaw.ru/award?keyword=bandura+1977+pdf PDF link annotation
    • http://huseyincanx.com/what_are_the_2_types_of_indentsulhi1.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/8904855.pdfIn PDF document text
    • http://rating-bookmaker.ru/jakixidebubolulifelolak5pz0o.pdfIn PDF document text
    • http://present-mag.ru/649093875650eu91.pdfIn PDF document text
    • https://pilidikuvitas.weebly.com/uploads/1/3/4/7/134766888/0c6b1cb2479.pdfIn PDF document text
    • http://scrlt.xyz/47397569752v6hic.pdfIn PDF document text
    • http://retys.space/johnny_depp_don_juan_demarco_full_moviecqf9i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453902/normal_5ff9cced4f8f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458122/normal_605ef7e7b2690.pdfIn PDF document text
    • https://lolujimibo.weebly.com/uploads/1/3/0/7/130740441/7541093.pdfIn PDF document text
    • http://torevifij.iblogger.org/madilyn_bailey_titanium_sheet_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420237/normal_5fe5df51db6e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409246/normal_6033766a463a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476268/normal_600fe80339ee4.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/a974c622-689a-498b-84a4-40f2c724cf46/tedunoxenapuluw.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/excel_2013_waterfall_chart_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7004ab3-6828-466b-8f40-9f8ca72e0445/bawobufuxuvoseno.pdfIn PDF document text
    • http://sowiriged.rf.gd/tamilrockers_2019_movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b26bbcdc-26e9-4727-87e6-9b28fdaca1d0/51626233480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00c74240-9898-48b2-ac77-efe7d4c74adf/laporin.pdfIn PDF document text
    • http://poxelisenaxoxig.epizy.com/tedetasab.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/74740343121.pdfIn PDF document text
    • http://tanegonezato.epizy.com/bin_sachivalay_paper_2020_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/autocad_lt_2019.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_off00014093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14093 5164 bytes
SHA-256: 7ee387cdda6b7feb77d69422376cbf9b6d5f276b660a727ce7b8997ddc209375
font_01_sfnt_off00015243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15243 10680 bytes
SHA-256: 0e39790617db9e91e0183f683e11d4228b5d0f44cada89062c3879a7150dd5f8

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