Malicious PDF — malware analysis report

Static analysis result for SHA-256 710fa578e775b334…

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 11:56:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 74b5cdee0a6300d0f4ee3a4a72a2c293 SHA-1: 1925c546f48e7be97d7693698387315505da1a87 SHA-256: 710fa578e775b33466205abb5d0046d2e9ebb280583dcdf145805dcc6f25d449
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, linking to known malicious redirector infrastructure. The document body, though partially garbled, contains text related to 'Roblox Free Robux' and a URL that aligns with the heuristic findings. The presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.online/app/431946152/roblox-free-robux-freedom-game-hack In PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/mcpe-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/roblox-ftw_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/easy-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/roblox-gift-card-for-free_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
stream_004_off000051af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51AF 28052 bytes
SHA-256: 1af20e8295d115e1fb5b60b7acb77a7a7cbee904dbe3a057fe6f4e99d41d5435
font_01_sfnt_off000091e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91E2 18524 bytes
SHA-256: 28059590d372224246cc8da5d11c78ee7226da960fa5b9a4e07ef6c8fb6a1463

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