Malicious PDF — malware analysis report

Static analysis result for SHA-256 830cd6b6ed2bd9fc…

MALICIOUS

PDF

71.4 KB Created: 2021-01-25 13:02:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9b3aadcf01588a9f251dc4651982805e SHA-1: b110a281ed420e1110aa1bfc3cbb0672b65fc8a8 SHA-256: 830cd6b6ed2bd9fc547f6d57ad7ee3bfa445bb5d8faf9714a5a3c4e81508512c
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to obscure malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of a URL with 'utm_term=rare+fortnite+accounts' strongly suggest a phishing or scam attempt. While no scripts were explicitly extracted, the ML classifier and ClamAV detection indicate malicious content within the PDF structure.

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 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://trafficel.ru/123?utm_term=rare+fortnite+accounts PDF link annotation
    • http://pubgmobiie.com/1186409988vbgv6.pdfIn PDF document text
    • http://puzofogerexiwi.22web.org/android_names_pathfinder.pdfIn PDF document text
    • http://tevuvisena.iblogger.org/report_feral_cats_uk.pdfIn PDF document text
    • http://famojefefe.iblogger.org/conjunctions_exercises_with_answers_for_grade_8.pdfIn PDF document text
    • http://ferobuxanax.iblogger.org/lev_logbook_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bapexuzajo.epizy.com/7372898409.pdfIn PDF document text
    • http://bejutamukedus.epizy.com/gta_3_missions_guide.pdfIn PDF document text
    • http://dafawesag.epizy.com/free_printable_food_journal_sheets.pdfIn PDF document text
    • http://renowuvix.epizy.com/hydatid_disease_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/ancestry_tree_to_computer.pdfIn PDF document text
    • http://bilunijo.epizy.com/bupiliti.pdfIn PDF document text
    • http://vosimamasi.epizy.com/infinitives_and_gerunds_worksheet.pdfIn PDF document text
    • http://golofupatawef.epizy.com/amar_ujala_epaper_deoria.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/barbie_girl_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/54415569419.pdfIn PDF document text
    • http://medesawawolujim.epizy.com/bhse_onkelz_memento_album.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/jomoxidenuge.pdfIn PDF document text
    • http://tosopipates.epizy.com/badlapur_hd_video_song_pagalworld.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_off0000d9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D5 4848 bytes
SHA-256: 188a9929116969925423049aee8a8f24dcb1e53a19ef7d36fd47a066516f3c97
font_01_sfnt_off0000ea6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6B 11244 bytes
SHA-256: 14d24fb2208f481dee8b5c70e1706f4cad1ad444ef092dad3f110909ecf17931

Open this report in the interactive analyzer, or submit your own file for analysis.