Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f66cd953dbc25b2…

MALICIOUS

PDF

36.1 KB Created: 2021-07-02 05:32:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c2bca1fe275c3ad9643faa2cf4b3dacb SHA-1: e2c1338cc65979f5d5e0d0b3a1df40aad0847035 SHA-256: 1f66cd953dbc25b23b50e19d21dbc67b18d82396023448a76054820376418868
180 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free generators'. The primary lure appears to be a Roblox cheat, directing users to http://netcdn.co/app/431946152/hightlighter-player-roblox-cheat-game-hack. This suggests a phishing or scam campaign aiming to trick users into visiting malicious sites, potentially for credential harvesting or malware distribution.

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) 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.co/app/431946152/hightlighter-player-roblox-cheat-game-hack In PDF document text
    • https://bwsrubber.com/image/data/files/can-you-use-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-800-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-promocodes-that-give-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-free-2021-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-accounts-roblox-passbin_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-cheat-name_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000034c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34C4 22792 bytes
SHA-256: e9e831ed7f4c83938baaf94ca8a2569e1415688be8ac826e3e6d9e6c5e5636a0
font_01_sfnt_off000067d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D9 19212 bytes
SHA-256: c3d09fe7da9e20eae0ef412e66a41b6e8e6e6a900b907a5ea31b7138ec0bbe82

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