Malicious PDF — malware analysis report

Static analysis result for SHA-256 89fba9a1b8e1000a…

MALICIOUS

PDF

84.9 KB Created: 2021-03-03 19:59:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0dce3569bd07359f7bc096db6bd7b081 SHA-1: 236316b365970655d7a595fbce7b66f0d4543717 SHA-256: 89fba9a1b8e1000ae0def51a15dd2f52c1f3d27aa04eaec17c8fa74b3972df15
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, with several pointing to known malicious redirector infrastructure and disposable hosting. The document body, though heavily obfuscated, appears to contain keywords related to search terms, suggesting a phishing or scam lure. No scripts were extracted, but the presence of malicious links strongly suggests the PDF is designed to redirect users to harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=constellation+map+gift+canada In PDF document text
    • http://you-bestshop.xyz/36044282093xjv3p.pdfIn PDF document text
    • http://usejus.club/kidde_smoke_detector_beeps_3_timesarckn.pdfIn PDF document text
    • http://rometinanuk.iblogger.org/65393199640.pdfIn PDF document text
    • http://wwbook.org/59727400042u97up.pdfIn PDF document text
    • http://qlemelest.online/toca_life_after_school_apk_free_downloadx93f3.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/16411389486.pdfIn PDF document text
    • http://wewedaz.iblogger.org/catit_mini_flower_fountain_manual.pdfIn PDF document text
    • http://instapresent.site/vcredist_x64._exe_2010_freerh88o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://suginuzebaluwom.rf.gd/jogesuwujutivupafagu.pdfIn PDF document text
    • http://borovob.epizy.com/simple_present_negative_form_structure.pdfIn PDF document text
    • http://kadegezopofog.rf.gd/index_match_function_excel_different_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/reveropikikidubagi.pdfIn PDF document text
    • http://xofududegotu.epizy.com/ardmore_oklahoma_weather_report.pdfIn PDF document text
    • http://tejugezefufuli.rf.gd/jaxitejetekux.pdfIn PDF document text
    • http://fakesux.epizy.com/chrome_for_android_4._1._2.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/32468556118.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001026a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026A 5188 bytes
SHA-256: 9541a9de835a6296119b3fd846c6eda88309335f9ab94a84bcad77ee38db4cd5
font_01_sfnt_off00011403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11403 10640 bytes
SHA-256: b4c4f05b7fe5f52fe7e72617c8235506ea5c1dc366bf7c7ad7f5cc44befd348c
font_02_sfnt_off00013837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13837 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34