Malicious PDF — malware analysis report

Static analysis result for SHA-256 d33be1ca23d6637f…

MALICIOUS

PDF

42.6 KB Created: 2021-05-10 13:38:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9d96df79cd29cf10f8826566f91febbc SHA-1: b4394ed3e3e23d1fa947c6e1b6092208983e3e68 SHA-256: d33be1ca23d6637f6b83b82b8351efa563fa0d5f34fae175184d28c8a6e768f3
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users to websites offering game hacks and free in-game currency. The primary malicious URL identified is https://netcdn.xyz/app/431946152/how-to-get-free-robux-easy-no-download-game-hack, which is flagged as a known malicious redirector. The document also hosts a large number of SEO-optimized PDF links, suggesting a link farm or SEO poisoning tactic to drive traffic to potentially malicious content. No scripts were extracted, but the embedded links and heuristic firings strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.xyz/app/431946152/how-to-get-free-robux-easy-no-download-game-hack In PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/earn-robux-websites_GM431946152.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/roblox-18_GM431946152.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/free-spin-coin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/how-to-get-free-coins-in-coin-master_GM406889139.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_003_off00004869.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4869 24724 bytes
SHA-256: 0dc8debd8fe73adf0d362f06f2912b003b4d6ed8dcede7c36667cfbd4ecc8edb
font_01_sfnt_off0000817b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x817B 19108 bytes
SHA-256: 7bc61c49a0b734df4d56b9cb8c894117daf111bfa68c773dcc76edca8f070452

Open this report in the interactive analyzer, or submit your own file for analysis.