Malicious PDF — malware analysis report

Static analysis result for SHA-256 a24e0497680c695f…

MALICIOUS

PDF

34.7 KB Created: 2021-06-24 03:25:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2fa1636422a7a637a144c2b0cb8c07b2 SHA-1: f42799ac95fc540038257afdd3538f29d4e6eea9 SHA-256: a24e0497680c695fd2acf39b4b290e619f465765fe29fa50cab037ced0be43f6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious domain, masquerading as a generator for game currency or hacks. The heuristic firings indicate that the PDF is designed to lure users to this malicious redirector. While no scripts were explicitly extracted, the nature of the embedded links and the lure suggest an attempt to drive users to a malicious site, likely for further exploitation or malware delivery.

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.co/app/406889139/coin-master-free-spins-daily-2021-game-hack In PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-by-imaddi_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/krnl-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/freerobux-co_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/robloxhacks_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/cheats-in-roblox-pet-simulator_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/can-you-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-daily-free-spins-25_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
font_00_sfnt_off0000300a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300A 22672 bytes
SHA-256: 304469baab150c1e94e668baed49de81412d27c00b77d00122a91c0f738192f9
font_01_sfnt_off000062b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B3 19000 bytes
SHA-256: b814766d9c7402c53a67f950003b037573ebc2ab6a90739559792a4ced8a8c51

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