Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eda8bc1cb3da9d6…

MALICIOUS

PDF

32.6 KB Created: 2021-07-09 17:48:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 148db6b6752dd4f40f4a4565e38fc3cc SHA-1: 414e2964aeb33796820063d9c7c7b849ebfbd825 SHA-256: 4eda8bc1cb3da9d60da747112f9fb86fb52262e91838237be47c465d6b1554f5
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 0.9980

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/free-robux-2021-no-verification-game-hack PDF link annotation
    • http://foo.com.tw/files/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/hacks-for-roblox-phantom-forces-2021_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/fightforglorton-free-l-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-assassin-hacks_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/wurst-112_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-anti-hacking-saving_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-roblox-robux-generator-2021-no-human-verification-and-survey_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-hack-no-human-verification-pc_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-admin-commands-roblox_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-free-robux-2021-without-contacting_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/robux-gift-card-hack-code_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_off00002bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BD4 20860 bytes
SHA-256: c4f87ee79f1213997abf19fd6ca2ba5eea3bced520c1f4a09a60927c06206b76
font_01_sfnt_off000058f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58F9 19476 bytes
SHA-256: 55ad41a6ce49086aa15382541082a2b64ef707ba2ed30a01096caf72f6ded3f0

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