Malicious PDF — malware analysis report

Static analysis result for SHA-256 777fca6a02ee08f4…

MALICIOUS

PDF

78.0 KB Created: 2021-05-19 13:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ee81ee3a7f4084d8d5c54ea92401bd67 SHA-1: 230a3d63736defbb1c6c45838cf3cc17bda2fe38 SHA-256: 777fca6a02ee08f46a48d51b83b7a4617e917392fca9fdf9455bf06daf0f042d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of external links, with a critical heuristic firing for a PDF link farm. One of the primary external URIs points to 'xajibur.ru', which is likely part of a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://xajibur.ru/strik?utm_term=aegis+x+geekvape+manual PDF link annotation
    • https://dowabibagugodu.weebly.com/uploads/1/3/4/6/134697665/ralobebujaxaz.pdfIn PDF document text
    • https://kowuzuworos.weebly.com/uploads/1/3/2/6/132682574/mebapavizadowefev.pdfIn PDF document text
    • https://fegexogemitise.weebly.com/uploads/1/3/4/6/134602812/4700f.pdfIn PDF document text
    • https://vewezefamipuwir.weebly.com/uploads/1/3/4/6/134630759/5024341.pdfIn PDF document text
    • https://vuwugaletop.weebly.com/uploads/1/3/4/5/134588193/fugotiguvil_gelewaj_fegarajet.pdfIn PDF document text
    • https://jinafoxibufesow.weebly.com/uploads/1/3/5/2/135293268/birudiko-finezoza-zamelogidaw-suzebigogo.pdfIn PDF document text
    • https://rinulokol.weebly.com/uploads/1/3/4/8/134868038/58b14bdabb92.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/ab1034aa-98db-4397-8039-32f60d91b357/15444228625.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/sister_calling_ringtone_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/ssrs_report_header_only_on_first_page.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e956abf7-d168-4e46-a586-8e8805482912/saving_your_second_marriage_before_it_starts_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/473c2f3f-f008-4453-90af-5edb7aa014aa/zoruxujelozudilega.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/census_2020_registration_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/59055865382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02e67eb2-a454-40f2-94ca-55a70cb1eece/46741263516.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/instagram_logo_svg_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/aircraft_maintenance_technician_jobs_overseas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9c992ba-6f89-48a3-ae41-de4441f3fa06/bissell_symphony_pet_steam_mop_leaking.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/hooters_foh_menu_test_answers.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_off0000eff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF5 5224 bytes
SHA-256: f1ab5e96564b6745a320dae18be67773d288b4cecff2538b87bb74108b12065e
font_01_sfnt_off000101c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C3 12640 bytes
SHA-256: f43cb7c39507c2fe1ed1f5bc98675bb77ff417f483de39284742f61ace6e4085

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