Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a0b2322ccfbef9d…

MALICIOUS

PDF

76.7 KB Created: 2021-03-03 23:50:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ffd461742d6f4ab934e4a522ac953621 SHA-1: db390238513751165629872c526e6bc376c86231 SHA-256: 7a0b2322ccfbef9dc52a9c6243f8d6caa433bb06457c5587b2a2fc63dd412c9e
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'mezovuduw.ru', suggesting an attempt to redirect the user to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host many links on disposable domains, further supporting a phishing or malware distribution motive. No scripts were extracted, but the PDF structure itself is used to host malicious links.

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://mezovuduw.ru/123?utm_term=nail+shops+open+late+memphis+tn PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4530937/normal_600bd6393a9e7.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/88365180470.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/IyggZgh/nomao_camera_for_android_apk_full_version.pdfIn PDF document text
    • http://kawafopi.mygamesonline.org/is_netgear_nighthawk_r7000_compatible_with_nbn.pdfIn PDF document text
    • https://cdn.sqhk.co/bagadogod/haieig7/sony_frantics_playlink_game_ps4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459328/normal_5ff7cdd303a01.pdfIn PDF document text
    • https://cdn.sqhk.co/poxudanefisi/Jibhchc/fruit_logistica_2020_tickets.pdfIn PDF document text
    • http://gifizerijoku.22web.org/95409576981.pdfIn PDF document text
    • https://cdn.sqhk.co/gasalikuviz/eiaO1yN/what_caused_the_russian_civil_war.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459320/normal_5fca4b8e4d4a6.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/DhhKKUN/serefu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485454/normal_5fed39d6747ba.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/i2hi83M/ribudovusomik.pdfIn PDF document text
    • https://cdn.sqhk.co/midijanere/agiUsji/stack_color_apk_download.pdfIn PDF document text
    • http://bilizan.iblogger.org/49675344690.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
    • https://s3.amazonaws.com/zifozujiwi/66487876597.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/bewars_movie_songs_telugu_lo.pdfIn PDF document text
    • http://jafixomedimun.onlinewebshop.net/what_is_the_reason_for_advanced_sunrise_and_delayed_sunset.pdfIn PDF document text
    • http://pejonoma.epizy.com/bottle_flip_3d_mod_apk_unlimited_diamond.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_off0000e1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E0 4720 bytes
SHA-256: 426408347108441207935bd9dafac8200dea6ad6ef23ae99f61e176a85f428a8
font_01_sfnt_off0000f1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B1 11056 bytes
SHA-256: 458bb750978cd5aea6fead8947a82fea1e4d5a0274be91649cec6da970ca1ade
font_02_sfnt_off00011759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11759 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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