Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d85b3c3889c68b6…

MALICIOUS

PDF

33.4 KB Created: 2021-06-25 22:10:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b959ae3d6843f455362a21b51c7a6b7b SHA-1: 21dccd5ce9ca5aed47d2f427a2d9176084723a5c SHA-256: 0d85b3c3889c68b65d59978f4d5ae5762996cb09959c25c235a3fc5cd1e98c7f
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 0.9824

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.co/app/431946152/how-to-cheat-in-strucid-roblox-game-hack PDF link annotation
    • https://allpromise.com.tw/image/data/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-copypasta_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/minecraft-items_GM479516143.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-no-servery_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-get-free-robux-yahoo-answers_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/haktuts-coin-master-free-daily-spins_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_001_off00002a38.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A38 22704 bytes
SHA-256: 24898a2bb8a315066c5aba2e7bbe55942d9cb9da3ba943e9a2aef841d8c29b46
font_01_sfnt_off00005cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC7 19352 bytes
SHA-256: 06e477ff8deab8ba411a2b36ca5c9ba5e5a56667cea9347d09fa34c6207d1af5

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