Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae78845835fcc58…

MALICIOUS

PDF

34.2 KB Created: 2021-07-07 08:16:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 170f5fec701c152ab85a9c67853d3345 SHA-1: 1b64cd41170b7f70ad1057ebec52272ffae429df SHA-256: 8ae78845835fcc5893f8d609e7313b2fdb6047329ca7854360285c78f231e383
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures for game hacks and generators. The document body and embedded URLs reinforce this by promoting 'how to get Robux' and similar cheats. The primary IOC is the redirector URL, which is known to host malicious content.

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) 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.tw/app/431946152/how-to-get-robux-game-hack In PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-codes-generator-download-roblox_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-coin-master-app_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/como-hackear-dragon-ball-rage-roblox_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/get-more-robux_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/roblox-lovenet_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/ghost-simulator-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/roblox-console-inspect-command-hack_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-daily-spins-coin-master-2021_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_off00002f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2A 22456 bytes
SHA-256: f40f80b0779b726a3b53118ddda2293ec904a568d018f1f8d3b980f3c1f6588b
font_01_sfnt_off0000613c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613C 18820 bytes
SHA-256: a2dfb2a65560055ec751139d067554c48d03732db01303c3495e5b92c6b8973a

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