Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c2eae2b23f30bf…

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 21:44:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 14d05bb6f13de5e262b933fc005778e1 SHA-1: bffd269320ef6f76ec5ee324319b48d2831667e3 SHA-256: 09c2eae2b23f30bfb85314ba6baaeaee761672ceeb25ee4ddfff95e214b71455
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a website offering 'free Robux' and 'game hacks', a common lure for malicious content. The heuristic PDF_GAME_HACK_REDIRECT_LURE specifically identifies this pattern. While no scripts were directly extracted, the document body and heuristics indicate a phishing attempt to redirect users to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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-robux-generator-for-kids-game-hack In PDF document text
    • http://libnh.stikesnh.ac.id/repository/tiktok-free-crunchyroll_GM835599320.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-hack-software-download_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_off00005042.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5042 27068 bytes
SHA-256: 13d87a904d932d0d53ab6d30d6a68e1a07d035a0350770fece5129245632abac
font_01_sfnt_off00008e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E86 18640 bytes
SHA-256: 699ebd5d78640cc812bbb586150daa4d415ceda65572c7c56e250d7f18cab54c

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