Malicious PDF — malware analysis report

Static analysis result for SHA-256 3adba343a6fa5c31…

MALICIOUS

PDF

40.6 KB Created: 2021-05-19 00:10:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 432fa68e5e9a98bf5641b44b9c24915d SHA-1: 403c37b5e558f8f58cb8bbd86995fa61441be921 SHA-256: 3adba343a6fa5c31a24634cb565d12087f70bb9314a9dce61398dfa515a11116
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 0.9971

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/835599320/why-tiktok-free-download-game-hack.
  • 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/835599320/why-tiktok-free-download-game-hack PDF link annotation
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus//repository/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus//repository/where-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus//repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus//repository/www-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus//repository/robux-win_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus//repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus//repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus//repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus//repository/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/free-robux-generator-no-survey-no-download-no-human-verification_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
stream_003_off00004642.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4642 23248 bytes
SHA-256: db4ce3bb4978a931c1005f9bbef0f27b48d12b24bee1b1547c86ec9bf119ae11
font_01_sfnt_off00007a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6E 18808 bytes
SHA-256: 97be2c627cbc5b9c050860c359d053b9e03a2b49cbcd8a87bb01d079b0222165

Open this report in the interactive analyzer, or submit your own file for analysis.