Malicious PDF — malware analysis report

Static analysis result for SHA-256 d773fcd6a556da91…

MALICIOUS

PDF

49.7 KB Created: 2021-06-03 06:17:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e58cb16a3de04502a4d693e4ef4ad5d9 SHA-1: a7a0388fd1e1184a11afb66a44b42d2e81b1b0bb SHA-256: d773fcd6a556da91360aab78d47d58c228f9ecf65976af81ba750a5db26a8fc4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically promoting 'free Roblox promo codes' and 'game hacks'. The primary malicious link, https://netcdn.online/app/431946152/free-roblox-promo-codes-for-robux-game-hack, is identified as a known malicious redirector. The document body and embedded URLs suggest a social engineering lure to trick users into visiting these malicious sites, likely for further malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/431946152/free-roblox-promo-codes-for-robux-game-hack In PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/robux-earning-websites_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/roblox-system_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5070 28816 bytes
SHA-256: bd8be6cafbc04adfe81bf4426f26b407df2df9ff07b9769ae43f73200d196b17
font_01_sfnt_off000091a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A8 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EBA 18676 bytes
SHA-256: dfd02273a8a318689417f97410c8e56666a417a259e3d1ed1911a13d5d5a3d3c

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