Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f59bfa6970199c0…

MALICIOUS

PDF

46.8 KB Created: 2021-06-03 06:22:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 666bcb4b6f3fe29c5555af19bec794c8 SHA-1: 26987da0f2ebe33185bd2e377203f782b8453c4d SHA-256: 9f59bfa6970199c0e0c7367bb76533058f7afad2e279279013f83ed87522c593
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector, masquerading as a 'free generator / game hack'. The document body and embedded URLs suggest a lure for obtaining in-game currency or hacks for games like Roblox and Coin Master. The primary malicious action observed is redirecting the user to potentially harmful content via the provided URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.online/app/431946152/how-to-hack-roblox-game-hack In PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/mcpe-client_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-after-the-flash-hack-item-unlocker_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/pokemon-go-free-download-apk_GM1094591345.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-games-free-download_GM479516143.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
stream_004_off0000546c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x546C 27112 bytes
SHA-256: d5b06d6a2c2b3cb70c0e64e9d318502d7d14cea4a1f91985b7246fd9af69f6ba
font_01_sfnt_off000093f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93F2 18344 bytes
SHA-256: 73440050ee62d9c8dc97d7cf0d13859b5ca63a66159f36279ab18a86d0bf293f

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