Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd584b13df47f6f…

MALICIOUS

PDF

43.1 KB Created: 2021-06-03 22:36:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 3465cb463773581ccc26594b4ef2eacd SHA-1: a7980e2ad4d0eb434b7751efab2c890ceb8524ef SHA-256: ebd584b13df47f6fce6a1598c60d0bd978a3ade852bd757916b67e1bfe993689
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links that redirect to a malicious domain, masquerading as a game hack or free generator. The presence of a visual download button and the ML classifier's high confidence score indicate a malicious intent to trick the user into navigating to potentially harmful content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.online/app/406889139/free-spin-and-win-coin-master-game-hack In PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/robux-sites_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/level-coin_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-bit-slicer-hack-august-2021_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-comcom_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e76.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E76 24252 bytes
SHA-256: b66981cfda47ecaceced3bd9476a113d5c747fdefb7705181f001bb2556597a9
font_01_sfnt_off000085a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85A2 18256 bytes
SHA-256: 9a1b20d80f3e4f809c9a9d9b8851ebdec2d0bde394b804bfd21e1aa58c8059b7

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