Malicious PDF — malware analysis report

Static analysis result for SHA-256 721635af2610cf3b…

MALICIOUS

PDF

78.0 KB Created: 2021-03-19 21:09:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1d484699c11250f9fe531c3b0650a81 SHA-1: 244412cfcf373d95e6aafa423486ff23b4d40660 SHA-256: 721635af2610cf3bdeb3f42950d933a0a2e11a62588f71f88811eb7ed4a5bcbd
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to 'https://zajinet.ru/strik?utm_term=project+management+career+opportunities+in+kenya'. This URL is presented in a context that suggests a phishing or social engineering attempt, likely to trick the user into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the presence of external URLs in a PDF is a common vector for malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://zajinet.ru/strik?utm_term=project+management+career+opportunities+in+kenya
    • http://tokigarodam.22web.org/joziboge.pdf
    • https://cdn.sqhk.co/letarezetap/CKsihKb/40504930244.pdf
    • https://cdn.sqhk.co/pasojixaju/hbld5H7/ultimate_status_video_app_free_download.pdf
    • https://cdn.sqhk.co/joxutedunik/ifjcQVZ/radio_days_movie_streaming.pdf
    • http://fanogizakelime.iblogger.org/78495165651.pdf
    • https://cdn.sqhk.co/kuzefoke/c0iet8i/fha_guidelines_student_loans.pdf
    • http://medakijizu.22web.org/4th_grade_math_practice_test_with_answers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/fifuto/wodefodafigabixot.pdf
    • https://s3.amazonaws.com/libusamagowuvo/kinds_of_pronouns_worksheets_for_grade_6_with_answers.pdf
    • https://s3.amazonaws.com/bejeseja/buoyancy_principle.pdf
    • http://jagazuzigi.epizy.com/sony_ps_vita_memory_card_16gb.pdf
    • http://geworikirabud.epizy.com/41651525293.pdf
    • https://s3.amazonaws.com/jazofi/bill_james_baseball_abstract_1982.pdf
    • https://s3.amazonaws.com/fotepopunaj/ccs_pic_c_compiler.pdf
    • https://s3.amazonaws.com/juvetaso/advanced_maths_guide_for_class_9.pdf
    • http://kibuwigukakew.epizy.com/metejiwube.pdf
    • http://lagufezoseni.rf.gd/percy_jackson_casting_call_2021.pdf
    • https://s3.amazonaws.com/kakekojezutok/battery_doctor_apk_apkpure.pdf
    • https://s3.amazonaws.com/xomudufe/vefakudiw.pdf
    • https://s3.amazonaws.com/padadutiseni/chemistry_vsepr_worksheet.pdf
    • http://jopugobov.rf.gd/lezotibitesa.pdf
    • http://mepivew.epizy.com/how_much_does_a_round_bale_of_hay_weigh.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_off0000e559.bin
ffcf22db7ab801ec1f4633f2861c6a138ebfbe230e55e3733ad7844e850dc00b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE559 5344 bytes
font_01_sfnt_off0000f77a.bin
035f13c337d398282e372a5b013abeb61cf900b5c8e2de923c180917c08c66a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF77A 10804 bytes
font_02_sfnt_off00011c31.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C31 4324 bytes

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