Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b9d9ec5c4b78b4…

MALICIOUS

PDF

46.7 KB Created: 2021-06-02 06:41:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5d394fa97682f863b4455bc77827eeac SHA-1: f563a66e3e2e6382dfd5cf8d861926c146fbcd11 SHA-256: c2b9d9ec5c4b78b4e52118e91e8b707f6b2c6f47b48c8d1e73f9ae67ef71ef79
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 0.9748

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/how-to-download-minecraft-for-free-on-pc-game-hack PDF link annotation
    • http://sbm-nn.ru/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/rbx-claim_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://freegiftcodes.euIn 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_004_off00004f56.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F56 25464 bytes
SHA-256: 5ea6774bdc01e7c6899fb69975ce8f42481362dc6044949db9310f8928bb0680
font_01_sfnt_off00008962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8962 2880 bytes
SHA-256: 60b105f23d7c6c3680b6804fe43f53dd5dd8f270366462d13461838bcdf434f1
font_02_sfnt_off00009356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9356 18444 bytes
SHA-256: 9e3148d8479467241e454dad7f95496d0753043299a483a1afd63e9d4426fe5d

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