Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe85381154dbfb6…

MALICIOUS

PDF

32.2 KB Created: 2021-07-19 16:03:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: dcc3dceb3a3fef322d2c6c8f126323de SHA-1: 7df77b3db888a4f19dea4f38731b70cafbec4060 SHA-256: afe85381154dbfb64989fc640470dcc36f481b50cc44199812281e47d8ea19b7
180 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, specifically advertising "game hacks" and "free generators" for popular games. The document body also contains a call-to-action phrase and embedded URLs, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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.tw/app/479516143/minecraft-free-trial-game-hack In PDF document text
    • https://nexsoftech.com/upload/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/free-followers-for-tiktok_GM835599320.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/minecraft-login-free_GM479516143.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/how-to-get-free-robux-with-no-verification_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_off00002d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D05 22092 bytes
SHA-256: 4a6d4ea4d191aa9075ce36995389a7f46709695c1b3d6ed609003e422b123a72
font_01_sfnt_off00005db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB4 17644 bytes
SHA-256: eaa999d9fcd0e41c3411a6787ff304b3b9a642a81f97c4ae06503d53e3265cce

Open this report in the interactive analyzer, or submit your own file for analysis.