Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c2d00c3cc95268…

MALICIOUS

PDF

80.9 KB Created: 2021-05-04 02:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: ba9421c717068eea236ca113f1aca285 SHA-1: f8ca96ea8749323e0f1254c88f1c534d1f5ded65 SHA-256: 07c2d00c3cc95268be8368c8335f341ff4f20b21f623042c7b84cb4f98e2a43e
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://vilenefex.ru/strik?utm_term=vampire+diaries+books+set', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a lure related to 'Vampire diaries books set', indicating a social engineering pretext. No scripts were extracted, but the presence of external URIs and the ML classification strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/strik?utm_term=vampire+diaries+books+set PDF link annotation
    • http://buxosuloxe.iblogger.org/appearance_and_personality_exercises.pdfIn PDF document text
    • http://nekimul.22web.org/93462932310.pdfIn PDF document text
    • http://lisipezasuk.iblogger.org/how_to_start_software_engineering_career.pdfIn PDF document text
    • http://summer-italy.fun/woboripowexejusci43a.pdfIn PDF document text
    • http://jufobimagif.iblogger.org/me_before_you_vietsub.pdfIn PDF document text
    • http://zoom-omsk.ru/38411450881cyy19.pdfIn PDF document text
    • http://appletopshop.ru/java_7_update_80_filehippo702yk.pdfIn PDF document text
    • http://rarurude.22web.org/how_to_remove_local_area_connection_windows_10.pdfIn PDF document text
    • http://fejoromawefobo.22web.org/kenmore_coldspot_model_106_how_to_remove_ice_maker.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/67403729228.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/come_on_eileen_sheet_music_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/4527338802.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/watch_harry_potter_movies_free_online_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/33830822702.pdfIn PDF document text
    • http://bupagiji.epizy.com/the_little_red_hen_activity_ideas.pdfIn PDF document text
    • http://juwozevukiri.rf.gd/sharing_a_saved_video_on_facebook.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/d_d_5e_artificer_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/journal_entry_accounting_template.pdfIn PDF document text
    • http://nugamum.epizy.com/2775709951.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/livro_a_dieta_da_cabala.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_off000100b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B9 5244 bytes
SHA-256: fcc5d0392e6ba2b56cf50be6532d21e65b019e416b418325418818fca053737e
font_01_sfnt_off00011272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11272 10532 bytes
SHA-256: ff96842cda1ab795aeccfd98093b24c3949c6d77c94f95242b34b0596c7a181f

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