Malicious PDF — malware analysis report

Static analysis result for SHA-256 42779e65d102cc0c…

MALICIOUS

PDF

33.6 KB Created: 2021-07-04 12:54:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: bf1a92b994c331631fa7d5727565e552 SHA-1: 3923f511095a316272c89ebf823e91902c0a237f SHA-256: 42779e65d102cc0cbb5e20a03045b2a1408093cba9c42c1734ea386479c8cd1f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack generator. The primary link, http://netcdn.tw/app/406889139/the-coin-master-hack-game-hack, is identified as a malicious redirector. The document's content and embedded URLs suggest a social engineering tactic to drive traffic to potentially malicious sites, likely for further exploitation or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/the-coin-master-hack-game-hack In PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-robux-hack-xbox-one_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-prankster-face-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-the-conquerors-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/awesome-free-accesories-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-speed-hack-in-roblox-without-cheat-engine_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-lumber-tycoon-2-free-money_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/cerberus-hack-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-spins-and-coins_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_002_off00003079.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3079 21840 bytes
SHA-256: 79b91dafce97038d266e14c8ae59bd6447372fb3a16f75a6bea32d5b4637f9ed
font_01_sfnt_off000060d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D5 18172 bytes
SHA-256: f57f56fa31c3d175a3f1fa0851054e19c40acc708c3dd6ae86a2d8887aa1904d

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