Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e763d05bba397b1…

MALICIOUS

PDF

34.0 KB Created: 2021-07-03 13:02:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0863146840d1403ac4058d4230859ba3 SHA-1: c2c821ecf4b6af7ed3513a10a60136dbd26f76b9 SHA-256: 1e763d05bba397b1d60fa4d00a1e9697222b4b83bd936aac9a588c609272f018
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/406889139/games-like-coin-master-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-lucky-block-hack-script_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/hack-rogue-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/generation-for-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-hack-generator-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-fashion-frenzy-free-online_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-cheat-engine-bypass-sandbox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/1-minute-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-robux-without-paying-or-hacking_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-cash-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/points-for-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-fast-money-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-lua-programming-book-pdf-free_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-spins-and-coins-for-coin-master-game_GM406889139.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_off00002e9b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E9B 22968 bytes
SHA-256: a3f688c0b89bc3c7fa9ada2b0ff0025efc94f52be0a2bab65bf6a22e0a20fb33
font_01_sfnt_off00006233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6233 18264 bytes
SHA-256: 7d1498385015156658f2c4797ed1f9ef5355b2a3c7c805ee34a2c4c44564bfa8

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