Malicious PDF — malware analysis report

Static analysis result for SHA-256 d51f7d827b14d37c…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 07:15:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4ca2cb3dc3d81c3ef17b031ca6cfaa29 SHA-1: 281ffad349099978942899cb83d61378ec8aee6c SHA-256: d51f7d827b14d37cba0f62ce541afa1416248879c9105c1918b9adadddba701a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free game currency and hacks, directing users to the URL http://netcdn.tw/app/431946152/how-do-i-get-free-robux-on-roblox-game-hack. This URL is likely part of a phishing or malware distribution chain. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-do-i-get-free-robux-on-roblox-game-hack PDF link annotation
    • https://library.institutpendidikan.ac.id/repository/free-roblox-shirt-template-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/bullet-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-aofe-arc-cheat_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/dragon-ball-z-final-stand-free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-games-for-free-without-login_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-promo-codes-roblox-may-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/citizen-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-button-pastebin_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-speeed-hack_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/hack-roblox-aimbot_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-hack-download-jailbreak-noclip_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/como-tener-robux-gratis-sin-hacks-facil-y-rapido-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-free-pants_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/cheat-2021-robux-pc_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-roblox-items-codes_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_off00002f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8B 23028 bytes
SHA-256: a2faaad5e7e87e7abbc4d7fd20b2607063a2e25ce4d63dc0ebe836e4e51fd8af
font_01_sfnt_off0000627c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x627C 19228 bytes
SHA-256: e9643cf535cb35bfe77301aa7fad2e30087b9ada5d7646565701a14096303307

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