Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f9774eaa3954fa…

MALICIOUS

PDF

43.8 KB Created: 2021-06-09 10:53:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cb9c1a5f5cdb9fb71db4cc77232e09f0 SHA-1: 087c75c235f24647b7773ef6baca14af8ae1c2ed SHA-256: 07f9774eaa3954fa4c674b4654c420e3cb2a1e21575ecd135ab925ccf1da562d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/was-roblox-hacked-once-game-hack PDF link annotation
    • http://centr-expert.su/images/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://centr-expert.su/images/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://centr-expert.su/images/roblox-robux_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/free-robux-june-2021_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://centr-expert.su/images/tiktok-free-play_GM835599320.pdfIn PDF document text
    • http://centr-expert.su/images/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://centr-expert.su/images/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://centr-expert.su/images/how-get-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/hack-client_GM479516143.pdfIn PDF document text
    • http://centr-expert.su/images/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://centr-expert.su/images/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://centr-expert.su/images/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/roblox-adopt-me-money-hack_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/how-to-get-free-items-on-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
stream_004_off00004e58.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E58 26404 bytes
SHA-256: 091843326483e8645d6c3459139ad69ed4db00586e16a257bdd649e5134c0377
font_01_sfnt_off00008752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8752 18556 bytes
SHA-256: 4bfdb68287af77a3fd6471e676cd100a7cc69d936c69e949265279fdc9ead2aa

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