Malicious PDF — malware analysis report

Static analysis result for SHA-256 3272cf99bcb2f825…

MALICIOUS

PDF

35.9 KB Created: 2021-07-03 13:11:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f18c2ce174bb3d7ccae1b6c34753e848 SHA-1: e6eec2c0a5cb2f513acc1b4ef64fa27a95dff280 SHA-256: 3272cf99bcb2f825b9686d06042e1b5f98ae27b9bbd827372ad735d5f734035a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one identified as a malicious redirector. The primary lure appears to be related to game hacks and free in-game currency, aiming to trick users into visiting the malicious URL. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or social engineering attempt to redirect users to potentially harmful content.

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/406889139/apps-for-free-spins-on-coin-master-game-hack In PDF document text
    • https://library.stikeswnpalu.ac.id/repository/become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/hack-robux-2021-fr_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/simple-ways-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/get-free-roblox-coins_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/pubg-uc-hack-app_GM1330123889.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/pin-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/super-simon-says-hack-roblox-espaol_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/just-go-to-mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/hack-week-2021-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-hacks-pc_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/robux-quiz-free_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
stream_002_off000033bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33BD 23968 bytes
SHA-256: 8c34fd6d84dc46ea30dd4392f39fc5d94350348253ddf9aaee109da3fe02cbba
font_01_sfnt_off00006a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A51 18176 bytes
SHA-256: 4d8eb0f8a0ca3875223533dbcbb3aa7de45378118781519f1d2f46a8ca285011

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