Malicious PDF — malware analysis report

Static analysis result for SHA-256 977e08fda38b312c…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 13:10:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f6db613faf4443d70dd305baed8def92 SHA-1: 4de043adc18cdabfb08290a57359e2d937b55a98 SHA-256: 977e08fda38b312cc2a733084f1babb9ad9f9b4ad4ec32cc703815878498a120
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.tw/app/431946152/how-to-get-free-roblox-gift-cards-game-hack. The document body and embedded links are designed to lure users into clicking these links by promising free game currency or hacks. The presence of embedded URLs and the nature of the lure suggest an attempt to direct users to potentially malicious websites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-to-get-free-roblox-gift-cards-game-hack In PDF document text
    • http://library.atim.ac.id/repository/free-robux-no-human-varucashe_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-shirt-creator-free-shipping_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-card-generator_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/youtube-roblox-jailbreak-hack-keycard_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-hack-scripts-android_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-things-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-hats-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/robux-hack-little-obby-studios_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-no-survey-no-download-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-codes-that-work_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-no-human-verification-or-offers_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/infinte-moneuz-roblox-injector-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/critical-strike-roblox-free-gamepass_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-gift-card-codes-not-used-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/script-to-hack-code-roblox_GM431946152.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
font_00_sfnt_off00003151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3151 22532 bytes
SHA-256: abbb315e71ac879bc3af9350c8d09c630a84c1e4d615fafc331c79e16956d4c3
font_01_sfnt_off00006379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6379 19212 bytes
SHA-256: 593eff5b5799541de0a02f4e8f554df8daac443dfed6aeb2634dba9bf3a9d672

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