Malicious PDF — malware analysis report

Static analysis result for SHA-256 0517ed81c660fc70…

MALICIOUS

PDF

81.8 KB Created: 2021-03-21 00:08:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e637789e8d2461e6ffb42109bf338074 SHA-1: e17f703e24503c9d32229f345aafde782f938667 SHA-256: 0517ed81c660fc70d062806c5256a9895aa8f02608ffd62205ff9faafcb1ca6e
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to 'Mechanical engineering career goals essay', suggesting a social engineering lure. The presence of numerous embedded URLs, including the primary one 'https://jacksth.ru/strik?utm_term=mechanical+engineering+career+goals+essay', indicates an attempt to redirect the user to a potentially malicious site. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://jacksth.ru/strik?utm_term=mechanical+engineering+career+goals+essay
    • https://cdn.sqhk.co/letinumi/ihfc4ie/epic_undertale_wallpapers.pdf
    • https://cdn.sqhk.co/ninivaxibab/cha4rEg/stickman_dismounting_para_pc.pdf
    • https://cdn.sqhk.co/mafozerekat/jjg2Xgf/90504166154.pdf
    • https://cdn.sqhk.co/dosakupu/hjgiMjd/simplenote_alternative_mac.pdf
    • https://cdn.sqhk.co/rubovadu/0Zkx36m/homeschool_lesson_planner_for_multiple_students.pdf
    • https://cdn.sqhk.co/nofatazor/c4j1jdm/college_football_scoreboard_cbs.pdf
    • http://wasatosu.sportsontheweb.net/xazus.pdf
    • http://wanezus.scienceontheweb.net/zirazokul.pdf
    • https://cdn.sqhk.co/bugininaxi/h2icqii/pipowutut.pdf
    • https://cdn.sqhk.co/sofizagumup/iidjd47/92721985776.pdf
    • https://cdn.sqhk.co/felebamifuk/ea0gj0Y/bafuv.pdf
    • https://cdn.sqhk.co/sawijewabob/hi9umCT/punizeke.pdf
    • http://runavowof.22web.org/xazomiwikujuwutam.pdf
    • https://cdn.sqhk.co/folikulezig/NITii80/colorado_secretary_of_state_annual_report_filing.pdf
    • http://patedeziw.mypressonline.com/46234197210.pdf
    • https://cdn.sqhk.co/pekotegafod/xhdbfhg/any_good_american_football_games_for_pc.pdf
    • https://cdn.sqhk.co/nukusigemug/jS3jj9x/418489053.pdf
    • http://gupozatu.22web.org/063_aluminum_sheet_4x8.pdf
    • http://larokamexi.sportsontheweb.net/rupujadigadal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://bibalaluroxute.epizy.com/android_developer_console_account.pdf
    • https://uploads.strikinglycdn.com/files/1aa6ed6f-6339-42a1-aac4-a180a993e3a1/dusadowuzan.pdf
    • http://vebowowibo.rf.gd/guxizerigimalovigixori.pdf
    • http://nevulera.epizy.com/71154767588.pdf
    • http://muwuvago.atwebpages.com/what_are_the_semiconductor_devices.pdf
    • https://uploads.strikinglycdn.com/files/7f94e7bd-fbe7-4bd8-a438-22e73134831e/gelikalapupavepimuvasaf.pdf
    • https://uploads.strikinglycdn.com/files/7cad3efc-99c6-49e8-a6cf-89f348a2d9e9/lukusisabujatomejarere.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f56c.bin
ec043e737379ac62b3c3511bd5815de5cdc4bac3fc5cb33e01db2d5efb1b6cec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF56C 4876 bytes
font_01_sfnt_off000105ec.bin
db82f8d71205503d390ce3197ca3f2150f2fe5663248fe927cb73e3c65d3846d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105EC 10952 bytes
font_02_sfnt_off00012af3.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF3 4324 bytes

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