Malicious PDF — malware analysis report

Static analysis result for SHA-256 0100add56c3a1145…

MALICIOUS

PDF

70.5 KB Created: 2021-03-16 22:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab24cf18569b16b76153e8f694dec157 SHA-1: 7d82e7db195aa5b29f6b08164d5dfa331cd7747a SHA-256: 0100add56c3a11457cec6a847341f0f7a23d255f15cfdba341bc6ed31364d5da
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains an embedded URL pointing to 'https://pelibifir.ru/wix?keyword=la+fitness+mill+creek+class+schedule', which is likely used to deliver a malicious payload or phish for credentials. The document body, though heavily obfuscated, suggests a lure related to fitness class schedules.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/wix?keyword=la+fitness+mill+creek+class+schedule
    • http://gumizofet.22web.org/adca_computer_course_fees_in_delhi.pdf
    • http://relodifalixogo.scienceontheweb.net/din_en_iso_5817.pdf
    • http://nexofozupugasi.mywebcommunity.org/jakusukenobodusoruluk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://joluvuworizuv.rf.gd/board_game_rulebook.pdf
    • https://s3.amazonaws.com/jizubisetebof/clasificacion_de_seres_vivos.pdf
    • https://s3.amazonaws.com/gonima/bariatric_surgery_guidelines_uk.pdf
    • http://wesafisuki.epizy.com/58853200983.pdf
    • https://s3.amazonaws.com/zonivezada/xexadatavukinijajamuwomag.pdf
    • http://wodowepakimeko.onlinewebshop.net/neet_biology_question_paper.pdf
    • https://s3.amazonaws.com/liguwubore/98448845108.pdf
    • http://xerikosepekev.epizy.com/zikaseg.pdf
    • http://sakigekoxigukil.epizy.com/china_visa_form_for_australian.pdf
    • http://sisudol.rf.gd/urdu_blogspot.pdf
    • https://s3.amazonaws.com/gekojulog/31372889449.pdf
    • https://s3.amazonaws.com/rovikibixu/bekusawevubozedazawuxa.pdf
    • http://nuwenukaxoxigam.rf.gd/43892830882.pdf
    • https://s3.amazonaws.com/sizadagazagaj/najemanuvurilikefetowesum.pdf
    • http://wonanikapudidak.atwebpages.com/27639202190.pdf
    • https://s3.amazonaws.com/tixedujegibex/que_es_la_destilacion_simple_y_fraccionada.pdf
    • https://s3.amazonaws.com/xakusineba/chattel_mortgage_sample_form.pdf
    • https://s3.amazonaws.com/fixararololu/kremlin_spa_guide.pdf
    • https://s3.amazonaws.com/widetunipet/because_i_love_you_song_pagalworld.pdf
    • https://s3.amazonaws.com/daniwodug/31939152921.pdf
    • https://s3.amazonaws.com/tamobalasu/11544059095.pdf
    • https://s3.amazonaws.com/savukojubusum/how_to_flush_a_tankless_water_heater.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_off0000d2f5.bin
9646b4b5061cee61b903521a413efbb85cc499c20ac1db82259ff4ab97c72cdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F5 5268 bytes
font_01_sfnt_off0000e4b9.bin
7aad81df20e12b5d13d21a4438e0a7df8db19edf634527e3d1289ef06589bf16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B9 11292 bytes

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