Malicious PDF — malware analysis report

Static analysis result for SHA-256 922232e604cd2e06…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 14:13:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 73a02e61abb7b51437a8d67f8a83f828 SHA-1: 0b6a5399fdeef2a7ce8320d5897170ee1b03abb5 SHA-256: 922232e604cd2e06c135c3e19673be70ccd33d22ab7f8e9f9b31246f81111e2e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to websites offering game hacks and free spins, a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of external URIs suggests an attempt to lead the user to a malicious site. No scripts were extracted, but the document's structure and embedded links point to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-free-spins-daily-game-hack PDF link annotation
    • http://opac.acehresearch.org/repository/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/who-to-hack-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/roblox-hack-account-discord_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-free-spins-1701-20_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_004_off00005261.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5261 24344 bytes
SHA-256: a936059736fb5b3b74c0409fad649bdc6438d2df7f88a7e1ff81c64309dffa34
font_01_sfnt_off000089ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89EE 18308 bytes
SHA-256: 220bb6194b1ab8a2bb399ca4a862914ac8d15b354bb0df2c737bc67699221dc9

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