Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f61aeddfa9274b5…

MALICIOUS

PDF

42.7 KB Created: 2021-05-18 04:20:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 554f9d8bd1ee635eb9e20cf91a5d2050 SHA-1: e9eaddb4d34ffded55ddcf6fcaa32cda9b70b765 SHA-256: 1f61aeddfa9274b55faade75ccf796691b7b42055f0f037bb263d4baf580af2c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and generators, directing users to a malicious URL. The ML classifier strongly indicated maliciousness, and multiple heuristics identified the external URI and the game hack redirect lure. Although no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

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/479516143/clients-minecraft-game-hack PDF link annotation
    • http://sbm-nn.ru/images/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-reddit_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_off00004ce0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CE0 25360 bytes
SHA-256: 2eb9ba68401a858882956ef64989ed825bb97dc031b76dd07602e7d179667dee
font_01_sfnt_off00008686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8686 17644 bytes
SHA-256: b1e6b7721ac76cdb58ab715170998ed65443e780ca06fc40eb483816b5c8893a

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