Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e84c09b1a773fe3…

MALICIOUS

PDF

85.4 KB Created: 2021-04-08 16:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e82694ddada3c3e4a030e5d4250cc256 SHA-1: ddd7eb8e6ce2117b29f1b1fd23e29a1468d9cd46 SHA-256: 5e84c09b1a773fe3050032324e6392f19bc5a9fef5e331a724ddb928dece9377
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/strik?utm_term=letra+del+himno+nacional+mexicano+en+nahuatl+completo PDF link annotation
    • https://cdn.sqhk.co/bepemuno/jfhg5vT/crossfire_board_game_video.pdfIn PDF document text
    • http://idealica-ordina.site/dobadozarp4431.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/wajah_tum_ho_movie_song_download_pagmoesc.pdfIn PDF document text
    • http://serovakarara.mygamesonline.org/similarities_and_differences_between_aerobic_and_anaerobic_respiration.pdfIn PDF document text
    • http://chaptejvxz.fun/83921448937zb9ot.pdfIn PDF document text
    • https://cdn.sqhk.co/ferudati/I6tgeia/piano_with_pad_band_mp3_download.pdfIn PDF document text
    • http://arm-watch1.club/rockyou._txt._bz2_freehjx62.pdfIn PDF document text
    • http://nibakelenixezas.getenjoyment.net/sarisigukokaxodeg.pdfIn PDF document text
    • https://cdn.sqhk.co/reruzemafow/jaHhdge/sound_effect_generator_online.pdfIn PDF document text
    • http://flash-sar.online/marksheet_number_mumbai_universityskeam.pdfIn PDF document text
    • http://conicppjry.bid/56800917873xuc96.pdfIn PDF document text
    • http://pss77.ru/basic_math__pre-algebra_workbook_for_dummiesahaln.pdfIn PDF document text
    • http://boraguw.medianewsonline.com/rikopilifuvekowubagora.pdfIn PDF document text
    • http://gizesodawesiv.mywebcommunity.org/main_branches_of_philosophy.pdfIn PDF document text
    • http://drenajkrasnodar.ru/89411212915mo8wy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4dcfe184-cd6c-48f8-9f23-5461c743a1d4.filesusr.com/ugd/cc8533_77ddd0f1ac4a48e6be8a3af3c2016a86.pdf?index=trueIn PDF document text
    • http://jitawidavez.atwebpages.com/business_model_canvas_strategyzer.pdfIn PDF document text
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_98de846e97b146698640dcf6b42ca929.pdf?index=trueIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_63fed4ecb1b84818a127ea602b3c14ab.pdf?index=trueIn PDF document text
    • https://2e8e3215-33bf-4fe1-bc67-b38dac560527.filesusr.com/ugd/269bb8_13109f47b9d74e54b820fb0b6a1d6427.pdf?index=trueIn PDF document text
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_4f733e8682ce4b2eabb5c9d4a082d22e.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D8 3984 bytes
SHA-256: 9df02c694008c87e217ef26ee77dc7f52fdf65e48000c7e5ab519b301c108d9d
font_01_sfnt_off000105ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EA 5144 bytes
SHA-256: 1315d1ce3a76beb27bb98ba09b57581779d5eaf7a0e0c447fb0431cefb9000d1
font_02_sfnt_off0001173c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173C 1596 bytes
SHA-256: c198a591ae584e5ce0ba4e9356ad643509fbd09026bb86d1b1e1e191a79662f1
font_03_sfnt_off00011f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5E 12220 bytes
SHA-256: e0d73708a2d9a077d8992a5ea5afbd2c67966af94f23dc7a355c9c72eccf1e5a