Malicious PDF — malware analysis report

Static analysis result for SHA-256 b71d4cca3602ffe1…

MALICIOUS

PDF

32.9 KB Created: 2021-07-06 12:50:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b19c3a80070c57a1ee097619ba861bec SHA-1: 6d489c663c8a263190450f1cbf4995baedc32e9e SHA-256: b71d4cca3602ffe1fdebb3f01339716417754836c4f280f7f567662cdc4b804d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document employs a lure related to game hacks and generators, directing users to a known malicious redirector. The embedded URL, http://netcdn.tw/app/479516143/minecraft-cheat-client-game-hack, is designed to lead victims to further malicious content. While no scripts were explicitly extracted, the nature of the lure and the presence of multiple related URLs suggest a phishing or malware distribution attempt.

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.tw/app/479516143/minecraft-cheat-client-game-hack In PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-money-hack-2021_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-was-hacked_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-swear-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-hack-tools-download_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-swordpack-t-shirt-free-shipping_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/in-roblox-how-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-800-robux-free_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-how-to-get-stuff-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-robux-hack-generate-99999-robux-loladarnel_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/http-www-cheatsguru-com-pc-roblox-cheats-codes_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-home_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/btools-hack-roblox-free_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-robux-hack-100-works_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/c-rex-hack-roblox_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
font_00_sfnt_off00002f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F04 21880 bytes
SHA-256: 00c922518b03aaf10eefa8c2e30b37ea2020c7640ea764bb2f57dd5adc24929c
font_01_sfnt_off00005ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECC 18096 bytes
SHA-256: a995cd656f0262510fbde6104514bc63f73b186495f82817e83ff315ecbe0e31

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