Malicious PDF — malware analysis report

Static analysis result for SHA-256 4764fc3ae8d01774…

MALICIOUS

PDF

48.4 KB Created: 2021-06-08 13:14:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f8f7cd999361422e48d79b1fea13c402 SHA-1: 4462bf8858724eedcee26b5c274207558d338004 SHA-256: 4764fc3ae8d017744c1a75f7c7b959dfd00e42b224d3ef97bad48d1c77d08cb7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure of offering free in-game currency and hacks for popular games, directing users to a malicious URL. The ML classifier strongly indicated maliciousness, and the embedded URLs are associated with game-hacking scams. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to exploit user interest in game cheats to redirect them to a potentially malicious site that may host further exploits or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/roblox-vehicle-tycoon-free-money-script-pastebin-game-hack PDF link annotation
    • https://reggieslockandkey.com/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-roblox-adopt-me-bucks-cheat_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/robux-com-free_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-bear-mask-for-roblox_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/pubg-uc-jazz-cash_GM1330123889.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-executor-roblox_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50E4 26692 bytes
SHA-256: 0ab814cffdc80d53301ff5bd1935c2b5b2f2298844e751e60c607bedcc0044a4
font_01_sfnt_off00008d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D57 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9741 19408 bytes
SHA-256: 62fdd6f0c6584373aff7102b94c92ee16f03919d605c9c31af79583255157e3e

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