Malicious PDF — malware analysis report

Static analysis result for SHA-256 55d7ac05aae39782…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 04:10:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 3ad7acc53aa6a65901ff0b35eb548c25 SHA-1: 1bbc754ae1f97fbd2db6653f609f57501f34fbcb SHA-256: 55d7ac05aae3978214022058682f44aa93c2bf990fb06eb9316f583946c09332
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/app-store-coin-master-free-spins-game-hack PDF link annotation
    • https://library.institutpendidikan.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/female-hacker-roblox-catalog-clothes_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/pastabin-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/complete-this-obey-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-lumber-tycoon-2-money-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-system32-host-file-hack_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-roblox-alternatives_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-cheat-engine-bypass-july-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-roblox-redeem-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/bowtie-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-hack-onto-someone-elses-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/link-for-free-spins-on-coin-master_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_off000030e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30E1 22816 bytes
SHA-256: 295bda956fb2535e699205c1cced9103dbc99422a73e8ce26ff1ff1411fb4586
font_01_sfnt_off00006431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6431 18176 bytes
SHA-256: 1914c70a1897e8b9d4b02f270e89f6433e610c3e4923e5823734a0b505f54885

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