Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab9f44722ea5bdd…

MALICIOUS

PDF

34.7 KB Created: 2021-06-18 15:27:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d1f3cb46f9626e6d4233a4477a6ff196 SHA-1: 96bcbc7e544eba0fa2eeaec75ff541e96a18fecd SHA-256: 4ab9f44722ea5bddafee0864d97a8c554cbd0c45da8794389d6dedc341ca6d69
180 Risk Score

Malware Insights

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

This PDF document employs a lure related to 'free generators' and 'game hacks' for Roblox, directing users to a malicious redirector. The document contains multiple embedded URLs that lead to further malicious PDFs hosted on suspicious domains, indicating a phishing or scam campaign. The presence of a visual download button and callback lure further supports a malicious intent to trick users into downloading potentially harmful content or engaging with fraudulent services.

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.co/app/431946152/roblox-is-it-free-game-hack In PDF document text
    • http://svadba-moda.kg/images/free-robux-with-private-group_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/blockland-for-free-robux_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-roblox-accounts-and-passwords-with-100-robux_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-robux-hack-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-robux-100-working-2021_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/roblox-hub-free-robux_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/best-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/roblox-granny-money-cheat_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/roblox-free-items-obby_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-roblox-heads_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-minecraft-account-reddit_GM479516143.pdfIn PDF document text
    • http://svadba-moda.kg/images/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/how-to-get-free-things-on-roblox_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_off000030a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A9 22784 bytes
SHA-256: 38a5775a27f37e2c72c75df06dd3d69b214d8a52d9fbc21711c5ff8a62e75aee
font_01_sfnt_off000063c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C6 18568 bytes
SHA-256: 705935f829187454b6543a49a6e7eb4a103817c22e9f7030a9714862fbf8afca

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