Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf4b8de19cd33348…

MALICIOUS

PDF

70.6 KB Created: 2021-03-18 03:21:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f316d218989eca50fa2c8b967b7788f3 SHA-1: e7ee476682d431d518f237e949993761c4685437 SHA-256: cf4b8de19cd333480e39718e6a8a387b2c9e73071081fa23745624c03d475865
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, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'jumiwimov.ru', which is likely used to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to 'Glencoe health concept mapping activities answer key'.

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://jumiwimov.ru/wix?keyword=glencoe+health+concept+mapping+activities+answer+key
    • http://zuvowizetigeko.22web.org/wolawisadigisak.pdf
    • http://pawusewi.sportsontheweb.net/biregutipuganufa.pdf
    • http://giwitijudaleka.mygamesonline.org/how_to_setup_pioneer_touch_screen_radio_bluetooth.pdf
    • http://ru-payment.casa/tewatujevyawx.pdf
    • http://jejunobu.iblogger.org/shinee_ring_ding_dong_video_song.pdf
    • http://creditactive.info/something_just_like_this_piano_sheet_music_freerxnqm.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bekusisit.atwebpages.com/pegasus_bathroom_faucet_cartridge_replacement.pdf
    • http://fogiwomagivizu.rf.gd/77536950337.pdf
    • http://manepiri.epizy.com/ancestral_worship_in_african_traditional_religion.pdf
    • http://zuwajuzi.epizy.com/magazine_interview_questions_and_answers.pdf
    • http://fevenubonanez.rf.gd/15153085418.pdf
    • http://liwumulexajuvi.epizy.com/brackets_free_for_windows.pdf
    • https://s3.amazonaws.com/fadupazageraf/dotasidabonotoxavawaduko.pdf
    • https://s3.amazonaws.com/supefujoxopubu/how_to_drain_bradford_white_water_heater.pdf
    • https://s3.amazonaws.com/bamepofewalada/92251743236.pdf
    • http://nuvefugokudob.epizy.com/15245328091.pdf
    • http://xunudijumo.myartsonline.com/audit_trail_example.pdf
    • http://kaluzepo.rf.gd/sevarowitubenapirunipiroj.pdf
    • https://s3.amazonaws.com/vaxebisapesi/xekidumelor.pdf
    • http://vifewupanog.epizy.com/vagomujonasafudoz.pdf
    • http://xekubot.epizy.com/wureletenen.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_off0000d3e6.bin
86ffc08136fc2d52f65f443814c659d61f63171d4b7122a71a8bfca1b770e80c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E6 5696 bytes
font_01_sfnt_off0000e741.bin
cbf898e96a82a9551f553472dc844c7bbc4f37154a8194b0a8c15091d305d8bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE741 10576 bytes

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