Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c39c40225c6d3a…

MALICIOUS

PDF

75.9 KB Created: 2021-03-14 01:21:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c5af93d0eebf7ee774340b36a06ee79 SHA-1: 134fc49ee02318490ce8b39cab7c16663c12d97d SHA-256: 89c39c40225c6d3a913e8eced4e7d014a25163f8d4d4aa69bdf029ce6cca3e05
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'speech writing format sample'. No scripts were extracted, but the presence of embedded URLs and the ML/ClamAV detections strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=speech+writing+format+sample+cbse
    • http://shopsupergood.site/percy_jackson_book_2_pagesf52iz.pdf
    • https://cdn.sqhk.co/sitosuduf/ggKiajb/naroz.pdf
    • http://tonagruz.ru/cancer_in_hindi_downloadwhheo.pdf
    • http://vataponuxizeliz.mywebcommunity.org/brahui_language.pdf
    • http://luwinilulurop.mywebcommunity.org/69496215230.pdf
    • http://sungo1.space/office_2019_standard_for_macy99og.pdf
    • http://copyrightsupporthelpcenter.com/ue_megaboom_2_bluetooth_pairingrgq3l.pdf
    • https://cdn.sqhk.co/zavonufovi/fihWijy/gujafusovivipiroxagexejuf.pdf
    • https://cdn.sqhk.co/guwewaxa/jea01xJ/bus_simulator_ultimate_new_routes.pdf
    • http://www-sfr-fr-monespace.com/8785720012952jo5.pdf
    • http://xiwakaravivomik.scienceontheweb.net/how_much_does_a_program_manager_make_at_amazon.pdf
    • http://dwatches.site/daguwajirufulewudutogulujsul6.pdf
    • http://leaninrzpd.site/17958772013tefq0.pdf
    • http://hightrade.club/the_complete_glycemic_index_gi_food_guide1xxj5.pdf
    • http://bigmagazin.xyz/fb_video_er_for_pc_freezmbmc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pekowob.onlinewebshop.net/queen_s_gambit_exchange_variation.pdf
    • http://fujufojijasowek.rf.gd/24478947792.pdf
    • https://uploads.strikinglycdn.com/files/766fffe8-20b3-4910-a80d-248ce73955cb/60686158415.pdf
    • http://najaxobefirag.epizy.com/multiplication_repeated_addition_worksheets.pdf
    • http://rodoluvajepitu.rf.gd/opera_app_store_games.pdf
    • https://uploads.strikinglycdn.com/files/5651ad4a-0d13-45dc-b52a-d030548bd25a/zudidajoka.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_off0000eab4.bin
11fdd5963bff5af0650b6cd54e3639cc21aefa8ff3b35fb9093c94a115a5e709
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB4 5764 bytes
font_01_sfnt_off0000fe39.bin
c1917742c1bbaa30489ce5e3681274a29614a0d3f9e3f3578bfb5f3f7546e479
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE39 10584 bytes