Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3bacb7772ad272…

MALICIOUS

PDF

78.4 KB Created: 2021-06-06 05:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5dfeacfaaacd577960d89e50ba13c2cc SHA-1: d3d6aae480e1ebb166dc6a9bea1e60962ea8f4e2 SHA-256: 2f3bacb7772ad2721924a929201cc2aba67adfaf4f45dd049d719696ea0177ee
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. The presence of numerous embedded URLs, many pointing to link farms and potentially malicious content, suggests a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://oniceh.ru/pbw?utm_term=50+first+dates+full+movie+in+hindi+dubbed+download+filmyzilla PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454973/normal_5fefee330c928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375351/normal_60698f66e1852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473902/normal_60406794474d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446380/normal_603a5f77efcd0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404733/normal_5ff21f89374c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mutoteja.pbworks.com/f/diamantes_gratis_para_free_fire_apk_2021.pdfIn PDF document text
    • http://dufogeruzipu.pbworks.com/f/area_triangle_parallelogram_trapezoid_worksheet.pdfIn PDF document text
    • http://gepefupugalu.pbworks.com/f/ruvisawuferuf.pdfIn PDF document text
    • http://sejuworepow.pbworks.com/f/miwasorajoruxu.pdfIn PDF document text
    • http://saladolu.pbworks.com/w/file/fetch/144589350/ganong_fisiologia_medica_23_edicion_bibliografia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbb49d47-10cd-4718-8d14-568d91fdb3eb/73800459786.pdfIn PDF document text
    • http://zezimin.pbworks.com/w/file/fetch/144635199/daily_school_attendance_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b0da84c-baf7-416f-9e8b-a6d786d2aad3/to_avoid_vague_pronouns_and_pronoun_shifts_the_writer_should_make_sure_that_all_pronouns.pdfIn PDF document text
    • http://zikasamu.pbworks.com/w/file/fetch/144463356/watesudibulunapaxaweromej.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/w/file/fetch/144425181/how_to_fix_keyboard_keys_typing_wrong_characters_-_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8133245-b2d7-4f1e-baf6-d04320748732/kejajowugula.pdfIn PDF document text
    • http://xuresasadox.pbworks.com/w/file/fetch/144440937/65763234026.pdfIn PDF document text
    • http://gomedaj.pbworks.com/w/file/fetch/144699732/all_secrets_in_toca_boca_pets.pdfIn PDF document text
    • http://supatibu.pbworks.com/w/file/fetch/144655719/25020486608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24bad573-beb0-464e-9073-f76653964af2/kesukazu.pdfIn PDF document text
    • http://jopamedet.pbworks.com/w/file/fetch/144699855/cross_browser_testing_free_trial.pdfIn PDF document text
    • http://tasonupopam.pbworks.com/f/how_to_program_rca_universal_remote_to_digital_stream_converter_box.pdfIn PDF document text
    • http://tezalef.pbworks.com/f/how_do_you_use_osito_foot_massager.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_off0000f1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E0 5764 bytes
SHA-256: 504de0b28c9f0ad5d03826996468a906fdf18ccba5c8b1ea3ba067a525088d43
font_01_sfnt_off0001057b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057B 11468 bytes
SHA-256: 0af7ffbb5a1a58ada7c0878fc0051acd359332550946bd3113031a573f8f211e