Malicious PDF — malware analysis report

Static analysis result for SHA-256 125cdd293cc97380…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 15:24:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 54bfd903a9b40b3cb380c07f78b049b0 SHA-1: 00bc552789f25a8528f53820c50ba793ab359d47 SHA-256: 125cdd293cc97380cdf1ae18b897f65101ada4765a6d730a102fd6a68cde9701
180 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The document body and heuristics indicate a lure to download or access potentially harmful content, likely leading to further malware or exploitation. The ML classifier strongly flagged this PDF as malicious.

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/roblox-mobile-hack-game-hack In PDF document text
    • https://library.stikesmi.ac.id/repository/free-roblox-intros_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-app_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-get-free-robux-in-2-mins_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-roblox-account-website_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/what-is-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/hack-for-rpg-world-on-roblox-to-get-money_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_off00002f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F33 22448 bytes
SHA-256: afc7ea5955f6e53fc353bc3271602623413e44c0bfa2933e8488ed86a5026328
font_01_sfnt_off00006108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6108 18972 bytes
SHA-256: 0e9155019685f09988e5274749080987783afe0cd242ca2fcc27e9f8310fa0e4

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