Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cbd914c605fa9f6…

MALICIOUS

PDF

36.7 KB Created: 2021-06-22 04:20:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9599b7c44b5d6252d7dbe6a271ced6b3 SHA-1: 6baed7443bbdf88fe32c16f37d3ae8e87e344793 SHA-256: 5cbd914c605fa9f615138baa3707077cf42478cb0f10147e25db8e5776c2d552
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as a 'free generator / game hack'. The document body and heuristics indicate a lure for free game currency or hacks, likely leading to a scam or malware download. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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.co/app/406889139/coin-master-hack-app-2021-download-game-hack In PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/robux-com-free_GM431946152.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/robux-gratis_GM431946152.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/claim-roblox_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
font_00_sfnt_off000035a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35A2 23272 bytes
SHA-256: ff567ff8b5657340c514b82cbf971bcf7dcd64770de3d97eaf0f9a71b9c4f42e
font_01_sfnt_off00006a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0C 19160 bytes
SHA-256: 08c3d26020315796c296df9400c9a2a920b0dbbe4ac3986bc7fb3bd2c9b27f96

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