Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06c449edb79fc40…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 11:24:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e14b93cb7db93d4c58f7b6819ee5f409 SHA-1: ce17fe2f248045be310840d89cb3c22585a863ef SHA-256: d06c449edb79fc40604fe3181791a68ff707c804298698c4554baff4993c7813
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free Robux and game hacks to trick users into clicking malicious links. The document contains multiple embedded URLs, with a primary redirector at http://netcdn.tw/app/431946152/how-to-get-free-robux-without-verification-or-surveys-game-hack, which is known to host malicious content. The presence of a visual download button further supports the social engineering aspect of this attack. No scripts were extracted, but the document's structure and embedded URLs strongly indicate 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/431946152/how-to-get-free-robux-without-verification-or-surveys-game-hack In PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/roblox-blocks-free-games_GM431946152.pdfIn PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/kazok-free-robux-game_GM431946152.pdfIn PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/roblox-prison-life-how-to-kill-all-hack_GM431946152.pdfIn PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/stella-download-roblox-hack_GM431946152.pdfIn PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/hack-para-todos-los-juegos-de-roblox-2021_GM431946152.pdfIn PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/roblox-destruction-simulator-hack_GM431946152.pdfIn PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/free-robux-code-generator-tool-no-human-verification_GM431946152.pdfIn PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/roblox-1x1x1x1-hack-music_GM431946152.pdfIn PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/free-robux-genrator-app_GM431946152.pdfIn PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/roblox-pretty-much-every-border-game-ever-hack_GM431946152.pdfIn PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/robux-robux-robux-free-game-in-roblox_GM431946152.pdfIn PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/cheat-farm-life-roblox_GM431946152.pdfIn PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/hacking-laurenzs-account-in-roblox-yammy_GM431946152.pdfIn PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/free-robux-actually-works-pink-sheep_GM431946152.pdfIn PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/how-to-hack-in-any-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/how-to-make-your-own-roblox-shirt-for-free_GM431946152.pdfIn PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/how-to-hack-in-skywars-roblox_GM431946152.pdfIn PDF document text
    • http://psikologi.unair.ac.id/digilib/repository/roblox-how-to-hack-an-account_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_002_off000030ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30CE 22764 bytes
SHA-256: 263860c4fbc4e61518f430f255be073dfb04ea88f7b9b25563cc833af7c27fc8
font_01_sfnt_off000063b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B4 19896 bytes
SHA-256: 37ec9b5a97e8c3032495185d82b71575b2e243d7fb6a4ee911979a924adec98e

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