Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a3e1cc5736fbca8…

MALICIOUS

PDF

78.6 KB Created: 2021-04-13 19:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 679469c8f8b0d00b88334daf2635768b SHA-1: 7e12dbfe7181fb0ce236832bdf3d4446e7713c08 SHA-256: 8a3e1cc5736fbca895db1db412cdf13932317af932711421e9e97ac30c2eaa3e
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'zajinet.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are commonly used for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=the+pact+2012
    • http://roskycnmx.com/51429706349mvmlo.pdf
    • http://rijoginijamibeg.mypressonline.com/curso_acordeon_de_botones.pdf
    • http://bidetoluji.getenjoyment.net/xelewojuritebop.pdf
    • http://vanimerukaguto.scienceontheweb.net/72540245522.pdf
    • http://vupaniseb.iblogger.org/what_kind_of_oil_does_a_honda_gcv160_power_washer_take.pdf
    • http://vvd.bar/69851147858ng3nv.pdf
    • http://lnstagramservicecopyrights.com/accrington_academy_sixth_form_number1o59a.pdf
    • http://tiluvopira.medianewsonline.com/happy_birthday_banner_template.pdf
    • http://napodosawukezob.getenjoyment.net/calicut_university_mcom_syllabus_2020.pdf
    • http://raxijinerig.iblogger.org/gumiv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/bodajaku/lewodugozoviliged.pdf
    • https://s3.amazonaws.com/loranoduzuja/bhoot_fm_low_quality_2012.pdf
    • https://s3.amazonaws.com/fupanabivote/job_interview_answers_phrases_in_english.pdf
    • http://zotuxegusam.epizy.com/capteur_infrarouge_fonctionnement.pdf
    • http://xekapakifujekem.onlinewebshop.net/boston_bruins_2020_18_schedule.pdf
    • http://bumejefivoxigo.myartsonline.com/sequence_card_game_board.pdf
    • https://s3.amazonaws.com/mulerux/antec_performance_one_p8.pdf
    • https://s3.amazonaws.com/penefelomiju/rmit_application_form_2018.pdf
    • http://xegebasitez.rf.gd/android_10_redmi_note_7_release_date.pdf
    • http://todidetiped.onlinewebshop.net/29689957022.pdf
    • https://s3.amazonaws.com/zidenigad/aghori_music_video.pdf
    • http://lozulunadiko.epizy.com/ethnoecology_situated_knowledge_located_lives.pdf
    • https://s3.amazonaws.com/voxazedisula/apa_journal_psychology_of_religion_and_spirituality.pdf
    • https://s3.amazonaws.com/vonuxagupeduze/jikore.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_off0000ebfe.bin
84f453689ce53436bf4e1d661cac90b7979ffb3cb509202ac31e497526e6e599		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFE 4516 bytes
font_01_sfnt_off0000fb60.bin
c7901c7ffe1d0976373bc5ff8300a19b675cd5b013928ee106e64ecef119f8ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB60 10612 bytes
font_02_sfnt_off00011f48.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F48 4324 bytes

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