Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5d9788da1c7daae…

MALICIOUS

PDF

34.0 KB Created: 2021-07-03 17:19:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fafe9cee56636e3d9e20d9978c72c468 SHA-1: a6a8f7e2922eeb73cc3b654c0400ea5a423b4375 SHA-256: a5d9788da1c7daae47cda161d50506d4bce47e97687714fb0847b8601f3b15db
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded links that redirect to malicious infrastructure, specifically advertising "game hacks" and "free generators" for popular games. The ML classifier strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which likely serves as a gateway to further malicious content or exploits.

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/431946152/rbxdemon-game-hack In PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-much-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-robux-code-that-everyone-can-use_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-roblox-exploiting_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-character-free_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-o-have-free-robux_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-injector-hack-2021-synapse_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-get-a-noclip-roblox-hack-working_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/redeem-code-hack-roblox_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-roblox-transmitter-generator_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-rocitizen-money-hack-glitch-daily-bonus-patched_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E2A 22588 bytes
SHA-256: 21ff649bfa253f8513293de93217ab7660cc9b1b92caf71c15790ca894b02f0c
font_01_sfnt_off0000606f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606F 18848 bytes
SHA-256: c8a2595e802ed22d3f92a782be696ae3de60702987379a605de61e4dc59e7030

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