Malicious PDF — malware analysis report

Static analysis result for SHA-256 1045174991ffe2b3…

MALICIOUS

PDF

45.8 KB Created: 2021-05-10 17:38:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 50b5d11d52d64ece4482d77c5cf727f1 SHA-1: 4753112264c3c325fa9f8ce123df2d45831f7b61 SHA-256: 1045174991ffe2b3084fa0a7d2b671e657b0e69a29d75a8277ce23029c96993e
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 0.9432

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/406889139/coin-master-freebies-2021-game-hack PDF link annotation
    • http://lib.untad.ac.id//repository/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-person_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-no-apps_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_off00004ae0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AE0 25896 bytes
SHA-256: e45d3d2607becc227531708edb9ad3e9a8d2148ab38fe20708db1763f0e2a9a4
font_01_sfnt_off0000867e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x867E 2880 bytes
SHA-256: 93b508a52e047ef4bff1d7d250d9aefd838e5a176ceb5e9be36ada0f8d333e07
font_02_sfnt_off0000906c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x906C 18272 bytes
SHA-256: 1bcb593477ee65390748ab733566666577cbeb3f4a2efe23a42d3af4bd8bc672

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