Malicious PDF — malware analysis report

Static analysis result for SHA-256 746c5e620dd2605a…

MALICIOUS

PDF

77.5 KB Created: 2021-02-11 15:36:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: db551e33a78ad6120bb3f22babbc6daf SHA-1: a77eef6e315816ef42e9746a70ae0831e2c20e6a SHA-256: 746c5e620dd2605a248e44b6b0197c8f2bee691e1638321502fa72debf90cd40
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a remote-support lure. 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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://baarspo.ru/aws?utm_term=year+2+spelling+test+worksheets PDF link annotation
    • https://cdn.sqhk.co/liripudeb/jfiigfz/how_to_make_a_list_in_html_notepad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449421/normal_5fdb32d4d52d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455195/normal_60104aa4bdaa8.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/jhfGHgi/teamviewer_quicksupport_download_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/zchdNxR/98842806814.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462732/normal_5ffbafab59f45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393752/normal_5fc5c3b31ed61.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fadadedezeker/zodizesododemagozokegisa.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/bajirao_mastani_movie_tamil_dubbed_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/online_11th_admission_form_pune_last_date.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/java_god_of_war_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/leave_letter_format_for_school_principal.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/40601627466.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/nowikariwakakeruzox.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/jfet_k30a_datasheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C8 5120 bytes
SHA-256: b3d6a7f562b5a5163200d9ff92739eed0ee5cfce4cc4542e185e64bcddbbc597
font_01_sfnt_off0000f637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF637 10956 bytes
SHA-256: 457b7174bc1f9d6bb07ee8e59dfc8259f541dd9627105d01884c6f481983d11a
font_02_sfnt_off00011ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD0 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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