Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a4eba76812289a…

MALICIOUS

PDF

96.3 KB Created: 2021-03-16 12:56:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2802a5646f2728a5ac2229f6b4807332 SHA-1: b08af31fe8301a5d9c591afdd3edebd8687206f1 SHA-256: 48a4eba76812289afb13f8650b3a62060c3c463781ff221cdc0bb7773ff0c331
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains and configured as link farms, suggesting a phishing or malware distribution scheme. The presence of 'utm_term' parameters in some URLs indicates an attempt to track user interactions, further supporting a malicious campaign.

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
  • 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://botokaw.ru/strik?utm_term=red+rising+book+6+release+date+2021 PDF link annotation
    • http://kawafopi.mygamesonline.org/what_fermented_foods_are_low_fodmap.pdfIn PDF document text
    • https://cdn.sqhk.co/bemaxopig/giHHlai/fatal_car_crash_last_night_near_me.pdfIn PDF document text
    • http://xudisoda.66ghz.com/guided_bus_route_tyldesley.pdfIn PDF document text
    • http://zetozofawa.22web.org/34064948575.pdfIn PDF document text
    • http://sisowim.iblogger.org/consider_the_infinite_geometric_series_12_x_32x_32.pdfIn PDF document text
    • http://tisiner.iblogger.org/wawenabimitapozakuvipa.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/boating_knots_bumpers.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/chcqggc/fast_save_for_instagram_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/xujurovemu/b79ybif/94456708271.pdfIn PDF document text
    • http://paxabak.mypressonline.com/rajamunewukale.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/1c6e3535-0137-4395-8806-ac9a9c699854/how_to_improve_human_resources_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47ab59bb-049a-4355-b368-defd22f738ca/zagifiwemamebod.pdfIn PDF document text
    • http://zuputes.atwebpages.com/is_haier_a_good_refrigerator_brand.pdfIn PDF document text
    • http://totaraxidob.rf.gd/addition_and_subtraction_of_vectors_worksheet.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/samsung_rf263beaesr_filter_location.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/plantronics_bluetooth_headset_not_working_windows_10.pdfIn PDF document text
    • http://kejijenifolavir.rf.gd/dajutoxitog.pdfIn PDF document text
    • http://xemugapot.rf.gd/pradhan_mantri_awas_yojana_online_application_form.pdfIn PDF document text
    • http://wodowepakimeko.onlinewebshop.net/mystery_of_belicena_villca.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_off00013670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13670 5684 bytes
SHA-256: 1ed7da2dfd022a2c80b819c9f081e87abaf81c1493934e5a93b67d844fea9169
font_01_sfnt_off000149de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149DE 12940 bytes
SHA-256: c728fadc46ccccef5e28abfe1a3cecd781c11335333ef50f5e38924ef5de509b

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