Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac1094de339b40fb…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 22:09:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d57e796d0bc28333c8109d8ba6b3f8be SHA-1: a9ffe3b17d27a1ce840b55435118cdeb0d556caa SHA-256: ac1094de339b40fb0bac27fd974495454c42c61f047b3042c9b58796fc99385d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, including one that directly links to a 'free Robux game hack' lure. This heuristic firing, combined with the ML classifier's high confidence, indicates a malicious intent to redirect users to a potentially harmful website. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting a site that likely hosts further malware or phishing content.

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/wahoo-gaming-co-free-robux-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hacking-pokemon-reborn-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/omo-recuperar-una-uenga-hacker-en-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-girl-hair-promo-code-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-speed-hack-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-without-sign-in_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/custom-admin-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spin-coin-master-link-2021_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
font_00_sfnt_off00002fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB9 21584 bytes
SHA-256: 7406da3cd11db1a95912ff1bf8cfdc9d4b5917f95415a238f1de58e437f604ed
font_01_sfnt_off00005f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F24 19460 bytes
SHA-256: 25181eaa6be0d5b476285318664890f4926978dca9587ea82b488640a0a05646

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