Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eddfb3bbcfe5fcf…

MALICIOUS

PDF

83.9 KB Created: 2021-02-15 09:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 687580cfaa38337ff2387e017a0926e1 SHA-1: eb4411c18be351184fe09da163c2e9bd28cad0e0 SHA-256: 8eddfb3bbcfe5fcf27e2efe3ab708bbcc569ade078dcccb1aa60338c2495b194
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that directs users to a suspicious domain, likely for credential harvesting or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to academic activity.

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://jottigo.ru/123?utm_term=aplia+reinforcement+activity+2+part+a+answers PDF link annotation
    • https://cdn.sqhk.co/wafabojunawa/yjdjdi8/22005651347.pdfIn PDF document text
    • https://cdn.sqhk.co/puburikob/GihghcU/lofiv.pdfIn PDF document text
    • https://cdn.sqhk.co/wedegetuso/hjYw1hh/hockey_games_today_what_channel.pdfIn PDF document text
    • http://netzamka.ru/68653742137jpx33.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujutenifo/gNij8bU/33177013701.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/giejcxH/85524933521.pdfIn PDF document text
    • http://dusosax.66ghz.com/vtcc_inspection_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/vomuvojovi/wgiu2ie/nova_galaxia_youtube.pdfIn PDF document text
    • http://dashcamtopbest.com/9514392658il8ku.pdfIn PDF document text
    • http://vkrowl.com/tebirokitofemojapavodix7c3yb.pdfIn PDF document text
    • http://new-volosi.ru/namikakavewozuguzutowatvsdh6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://filexumif.epizy.com/format_code_shortcut_visual_studio_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/baseline_test_2018_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/convert_lrtemplate_to_dng.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/windows_10_terbaru_2019_iso.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/16608609485.pdfIn PDF document text
    • http://poravilotizeve.epizy.com/forex_arbitrage_manual_system.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/idontwannabeyouanymore_sheet_music_piano_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/minecraft_hack_1._8_9_kill_aura.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/escala_de_alvarado_apendicitis.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/jolizuzif.pdfIn PDF document text
    • http://nubotediliwut.epizy.com/married_couple_couples_therapy_worksheets.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10824 5536 bytes
SHA-256: 3856cf0c962b49d151d4138f113e385a84abf63e732f1802b6687a1eb977989c
font_01_sfnt_off00011b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B03 11592 bytes
SHA-256: 668a3d96a157d02438795cc4694184d92040ae423be47a32a28dd62e0f420a69

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