Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97bfa2054c974e8…

MALICIOUS

PDF

41.1 KB Created: 2021-05-16 06:31:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a5357fe6cb87e601af000d2b4d0aa41b SHA-1: ab9add725161e570cdab8d57b9e17cb91c72cd76 SHA-256: f97bfa2054c974e84e0e2ef867b88f1eabe8a20b70a6d5d71ab2871776852815
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 0.9971

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-army-robux-game-hack PDF link annotation
    • http://cosver.eu/images/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/free-robux-co_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/roblox-executor-free_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/roblox-sued_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://cosver.eu/images/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://cosver.eu/images/rbx-com_GM431946152.pdfIn PDF document text
    • http://cosver.eu/images/haktuts-coin-master-free-spins-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
stream_003_off000045af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45AF 24532 bytes
SHA-256: 6400103f3c7ccc9e12f529c0643f89eaa82750b0ae2fcb69fd63c25f9f431d05
font_01_sfnt_off00007def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEF 18364 bytes
SHA-256: f83d3f603b487845ac1519eb998e5a07fc623aec3eb3ec32811a52b67b594203

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