Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3cd34773af06cf…

MALICIOUS

PDF

43.4 KB Created: 2021-05-11 19:30:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5f9e29e4d709e2f1e5ce624bc633e144 SHA-1: f96e28ee3ee3f84de419fa4f3e5af9a687efc209 SHA-256: 0e3cd34773af06cfd86e8557d697df373efcec37b9c44ed50dde5f8f2b3ff221
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "free Robux generators" and game hacks. The presence of a malicious redirector link and the ML classifier flagging this PDF indicate a high likelihood of malicious intent. The document body, though partially corrupted, contains text and URLs consistent with a phishing or scam lure, aiming to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/free-robux-generator-2021-game-hack In PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-2021-spin-link_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
font_00_sfnt_off00004994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4994 25812 bytes
SHA-256: 32ce09bb27d2d2c04001dad42342eded5102767cd612ce538f30e6a40e7eac14
font_01_sfnt_off000085cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85CC 18748 bytes
SHA-256: fca1806ffff7593a0a2d811b077fe14576afb362c0c2e8ffc695fbf8edc3964d

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