Malicious PDF — malware analysis report

Static analysis result for SHA-256 39836eca2ce55490…

MALICIOUS

PDF

79.0 KB Created: 2021-03-16 03:44:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 09681e8c8ce606c379c4aac80925e89c SHA-1: 7a979888a2d66cb5a60f358e56d329ed24c37d9c SHA-256: 39836eca2ce5549010310e3603c5f814c2dda3acbe7f8379e1113d2b19098a4b
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 and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'vilenefex.ru'. The document body, though heavily obfuscated, appears to be a lure related to product purchases, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/strik?utm_term=playboy+produkte+online+kaufen PDF link annotation
    • https://cdn.sqhk.co/vakamuzawa/uKghhaZ/carrom_board_game_online_play_free.pdfIn PDF document text
    • http://mybiol.site/xenibaxofifizisedokamer1fqw2.pdfIn PDF document text
    • http://lexaxak.mywebcommunity.org/56339948298.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/6gdWgeE/vpn_super_unlimited_proxy_chrome.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/jhhcOhc/vewatemusogewogadumejus.pdfIn PDF document text
    • http://gebajajax.22web.org/android_studio_java_version_support.pdfIn PDF document text
    • http://tojanulisito.iblogger.org/jefofo.pdfIn PDF document text
    • https://cdn.sqhk.co/kevovevude/phfpbja/41728106427.pdfIn PDF document text
    • https://cdn.sqhk.co/tuledapozato/gggdyw9/white_horse_running_video.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/kilejojeganemooiva3.pdfIn PDF document text
    • http://pokupka.space/9._snf_fizik_ders_notlar_indircoitv.pdfIn PDF document text
    • http://luminar4-download.xyz/is_pcm_or_dolby_digital_better_with_soundbarjuhyy.pdfIn PDF document text
    • http://wordwild-store.com/rubomefihf5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vutifuluviti.epizy.com/vowedixedupudo.pdfIn PDF document text
    • http://sulijugofogim.onlinewebshop.net/what_age_group_is_the_hobbit_for.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faed0e2b-b3b9-4439-b231-77287e87010e/factory_reset_honeywell_wifi_thermostat_rth6580wf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bafc755-2f63-4df5-b0f2-f1932b106a29/cuisinart_toaster_oven_tray_and_rack.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/rikopavinij.pdfIn PDF document text
    • http://tosawos.epizy.com/sri_rudram_namakam_benefits.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/tinikijetipa.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/2006_honda_odyssey_alternator_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/tobimajobixumiporumedi.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_off0000f3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CC 5164 bytes
SHA-256: 3928cedcf9dcf39f58baa3afbbe7ed4e288ff51ff979b39aa940a8566a60bbec
font_01_sfnt_off00010570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10570 11928 bytes
SHA-256: 4a87d6633d7afa77ea4c4bde6c9f342d40f8d2e8fd3c9e796fea3c28a37ec21a

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