Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b9bc386ed6b29bc…

MALICIOUS

PDF

35.5 KB Created: 2021-06-30 10:29:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6b5bf5ba998096a425e53cba79dfa264 SHA-1: 4b479a3d32cc651780eb429778a12b0d7dad2e26 SHA-256: 2b9bc386ed6b29bcb9a6de2989e2b6c58ba69856d766bb7ad8bca800cc546370
160 Risk Score

Malware Insights

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

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/how-to-get-free-robux-without-waiting-game-hack. This lure is designed to trick users into believing they are accessing a game hack or generator. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/how-to-get-free-robux-without-waiting-game-hack In PDF document text
    • https://trustindoutama.com/assets/CKImages/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/ery-promo-codes-for-robox-free-robuxs_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/buy-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/coin-and-spin_GM406889139.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/how-to-get-rs-in-roblox-free-2021-without-hacks_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/free-robuxes_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/commen-avoir-du-free-robux_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/roblox-attrition-hack_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/robux-gratis_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/give-me-robux_GM431946152.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • https://trustindoutama.com/assets/CKImages/files/free-roblox-game-for-computer_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_off00003249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3249 22520 bytes
SHA-256: 61fcb3e8aa24a6123df18a58f4fcb71ef789e21577eaa0a88078a03d9f402d05
font_01_sfnt_off00006467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6467 19468 bytes
SHA-256: 9f3b615b78de0ad3040833a14a6891d1d9b49ccae2e56bd14351d2327f00e7bb

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