Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdaf07e07adbf42c…

MALICIOUS

PDF

35.4 KB Created: 2021-07-03 15:16:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 74d692fce8ba587bd9d5f8181f369482 SHA-1: b0de43de8e1feced748c709cf0506ca1ca395497 SHA-256: fdaf07e07adbf42c27a24b522c056a956f2d5624c3068ea7c84d4586b645e6bc
160 Risk Score

Malware Insights

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

This PDF document employs a lure related to game hacks and generators to trick users into clicking a link. The primary link, http://netcdn.tw/app/431946152/roblox-virtual-piano-hack-game-hack, redirects to known malicious infrastructure. The document's structure and embedded URLs suggest it is designed to lead users to potentially malicious download sites or further phishing attempts. No scripts were extracted, but the PDF's nature and the critical heuristic firings strongly indicate a malicious redirection workflow.

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/roblox-virtual-piano-hack-game-hack In PDF document text
    • http://digilib.stimlog.ac.id/repository/wurst-client-download_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/gameflycom-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-slurp-hack-download_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-hack-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/artmoney-pro-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/wil-they-cheat-roblox-thumbnail_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-people-girl_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hex-number-gives-free-robux-by-robuxian_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_off00003227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3227 22628 bytes
SHA-256: 1f517d6e3d782e5d60e7632fccb357f51b8efbf16d4d09112dcde3d7a80f8a36
font_01_sfnt_off00006493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6493 19308 bytes
SHA-256: ac0b12c82d559b3be72d30cf0fcd146027b3ab84b7bf4186176777d7e9befd2b

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