Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f4f4f3a738aaabd…

MALICIOUS

PDF

44.7 KB Created: 2021-05-11 13:36:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5167062f9656ccf55170754cdab55cfd SHA-1: 1842d72a6bbab3d577bd6ec6578d6c3e7a90e678 SHA-256: 9f4f4f3a738aaabd5b36d128290cff8dfa04f04fa01bb3c9f9e1ba62955b78b5
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 0.9632

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.xyz/app/431946152/roblox-hacks-2021-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-xyz_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-websites-that-work_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_003_off000048e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E2 24500 bytes
SHA-256: c35243b499feb82750a688fa216375672db8e134f27c0ee899028b994efe6420
font_01_sfnt_off00008133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8133 2852 bytes
SHA-256: e9630f3bb738ae3bc329a423cf069c8035d70ce2227e3557c42815f85ad3284f
font_02_sfnt_off00008af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF4 18584 bytes
SHA-256: 09e382df304bf090e7d4979f9a4a25aa7e11969d647bdc760e706e621b680adc

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