Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c01502e611de5e8…

MALICIOUS

PDF

72.8 KB Created: 2021-04-06 09:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f754621d6110899fc8d6cb11e50d9a5b SHA-1: 24c4b49bae15f3d478fc05201180306bd5c8908d SHA-256: 5c01502e611de5e82114a31c218d5a3e88ce37d6c1a62d1662ef49e9295b37a7
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a link farm with numerous external URLs, suggesting an attempt to redirect users to potentially malicious sites. The presence of embedded URLs and the ML classifier's high confidence score further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/award?keyword=adding+and+subtracting+polynomial+worksheet+pdf PDF link annotation
    • https://cdn.sqhk.co/kululojilo/ghh3Ejh/earn_to_die_2_hacked_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nigigeje/iagipjr/56907070901.pdfIn PDF document text
    • http://ladujose.sportsontheweb.net/kojuwa.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/gQPbsig/halloween_cake_decorations_for_sale.pdfIn PDF document text
    • http://tonemisi.medianewsonline.com/transnet_bursary_application_form.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/ghizggP/mi_band_store_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/gZRgJBv/soziveja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_cc51924f02304f41ab2a291306ef0737.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b0b0ae8-1267-40fc-95a4-083364e5381c/dunululo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf29ff60-7282-4ee1-bf40-a62baa5c476f/wpf_tutorial_for_beginners_in_.net_c.pdfIn PDF document text
    • https://07f52280-50dc-49c2-beec-a2e30bf849d0.filesusr.com/ugd/7b8f90_34762e0faa5e453cb86e778918144ab8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/26117522880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f66fb022-2811-426f-ad6c-b046e9c05181/alpine_cde-133bt_bluetooth_setup.pdfIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_41e7a2e0d1ac4624ab898bf9cae1ffe3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f9ee0d9-8285-4346-a3d4-018df414da48/what_does_ice_in_your_veins_mean.pdfIn PDF document text
    • https://44f39d5c-a655-4437-91b6-62b11e148e71.filesusr.com/ugd/eb4c03_cdabc92a7a7b4d36af5718f0f96cc2f0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c40d6ee6-5139-4fab-bcb5-4d78512b9d3a/the_count_of_monte_cristo_2002_movie_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/438f7824-21ca-4a30-8cb8-ce892b7e6eb2/tokyo_ghoul_re_season_1_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4da2e328-3137-4e1e-abc2-131c52e70b1d/subimadinuvujoforanosow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0fff73a-fef6-4f22-a27f-46689acb2465/spectrum_remote_guide_not_working.pdfIn PDF document text
    • http://lugifer.onlinewebshop.net/examen_algorithme_corrig_st_s2.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/ancient_egyptian_language.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_off0000dc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9C 5956 bytes
SHA-256: 44ca3502dadeb09459756200fb5352cb5c43d833d7ff4c90e4d2bd4a037cbeb1
font_01_sfnt_off0000f0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D0 10444 bytes
SHA-256: 919e947e992a2ab326eb8aa425a4e8d838539a15f74d0c06d04c1dd3214b4650