Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae6f2a32b54d78f…

MALICIOUS

PDF

79.3 KB Created: 2021-03-15 06:17:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 390321c70dc2fe90514a9867d7b6e96a SHA-1: c7be70b661166922fb077284871e64295c7cbdb4 SHA-256: 9ae6f2a32b54d78fc32e2a046cb3ff5fb4c9eb4569a98780f88f6ee64f7c0f18
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The presence of external URIs and the 'link farm' heuristic indicate a strong likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/strik?utm_term=2012+jeep+grand+cherokee+service+intervals
    • http://itdiscount.info/best_text_to_speech_android_freeifqr1.pdf
    • http://gimemuwet.mypressonline.com/annamaria_testa_la_pubblicit.pdf
    • http://heliusdesign.ru/zawukuzexoxuloz1v4u6.pdf
    • http://mixezitubut.mygamesonline.org/a_christmas_carol_radio_play.pdf
    • http://jadogaxarabu.mygamesonline.org/harry_potter_2020_date_de_sortie.pdf
    • http://masajsalonunuz.com/monitor_27_led_asus_ips_mx279hzhfa5.pdf
    • http://naturaitalia.space/distress_tolerance_skillsn0vz7.pdf
    • http://davupopebuwiser.sportsontheweb.net/11281313220.pdf
    • http://cartest.pro/varovemixinadiladojasifar0u5u9.pdf
    • http://minosijasif.mypressonline.com/wiwedurapilak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zatozisuxaxabiw.rf.gd/faxusul.pdf
    • https://s3.amazonaws.com/mizeteb/multiplying_and_dividing_using_scientific_notation_worksheet.pdf
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_3e86c6fccf5347aeb27207267d061de9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/81ea03ce-82f7-4e37-a879-b44e654d8a14/cazadores_de_sombras_los_origenes_angel_mecanico_personajes.pdf
    • http://rovetenexosa.rf.gd/cunto_tiempo_tarda_un_residente_en_arreglarle_a_su_esposa.pdf
    • https://s3.amazonaws.com/sezebepit/chloroform_for_sale_uk.pdf
    • https://uploads.strikinglycdn.com/files/35d57d04-b304-4312-9b01-fff386f209bd/muxadidumoseporazusog.pdf
    • https://uploads.strikinglycdn.com/files/9da2167c-a214-4b60-a1c8-309e28cc7bad/how_to_change_the_time_on_a_techno_pave_watch.pdf
    • http://zapizuw.rf.gd/xadorimeriwupudete.pdf
    • http://sibugisijan.epizy.com/ridikikapukufurux.pdf
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_b7ccdc3ec88f4811ba25b494ff250a9d.pdf?index=true
    • https://s3.amazonaws.com/pugomonapoxuxe/55298436456.pdf
    • https://s3.amazonaws.com/wiwamoxamo/command_line_cheat_sheet.pdf
    • http://puloxivomavari.epizy.com/purple_flower_wallpaper_for_android.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f70c.bin
af9174c562dd7128b2ee16c026dbc665d61abcc1b0f643f3f7f3f2449f063628		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF70C 5768 bytes
font_01_sfnt_off00010abd.bin
91a1cf24547d68d50e2cf6314c383b3bf6a3cbc9e520f5ce10d53bb723e786ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABD 10888 bytes

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