Malicious PDF — malware analysis report

Static analysis result for SHA-256 23a1248799ab279f…

MALICIOUS

PDF

71.8 KB Created: 2021-02-24 06:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 758da168c2e9452d82afbc943d4b3525 SHA-1: d32bfda7f0917a7f36bcbac8117899591568772e SHA-256: 23a1248799ab279f38b2d9fabf29f98ee5cb10ca11454b58f1766f18f72f563a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://jacksth.ru/strik?utm_term=brother+hl-2240+driver+for+windows+10 PDF link annotation
    • https://cdn.sqhk.co/zotipimesaza/hemnijd/police_bike_racing_free_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/icbA4jc/senegalese_wolof_rice.pdfIn PDF document text
    • https://cdn.sqhk.co/zevolazezag/VGbLKwW/falit.pdfIn PDF document text
    • https://cdn.sqhk.co/bepesewutu/gikcECk/sales_management_software_open_source.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/Resibjg/rocket_man_elton_john_lyrics_az.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443602/normal_602b9ab54fb97.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/ijhg5z7/beyonce_homecoming_bugaboo_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/xorunase/eUMy070/kebizopuxanuzibabopabapi.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/javckig/infection_fatality_rate_covid_19_by_age_cdc.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/aURwaGp/warwick_jungle_runes_season_10.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/widuxade/zazezopaxudijiluwu.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/73159075512.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/aneurisma_cerebral_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/blankety_blank_questions_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/uefa_champions_league_theme_music.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/87521223091.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/kevanugodabejomotitojax.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/fractions_to_percentages_worksheet_tes.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/kiwifinusokisatizelesevaz.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/atoms_and_elements_lesson_14_answer_key.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_off0000d98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98F 5432 bytes
SHA-256: c61a1956aea558d583eb0bc2f48e003b2b81a3b9218ed3f37e21af56c0016651
font_01_sfnt_off0000ec36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC36 10976 bytes
SHA-256: df5495dac4695be9f4f474048e36a93a6a4b177b702c0b8c129f066ab8441cd5

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