Malicious PDF — malware analysis report

Static analysis result for SHA-256 179bd009b6d5e118…

MALICIOUS

PDF

33.5 KB Created: 2021-07-08 00:43:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ba9f11804b63ba69cca2c9ea3fe563a6 SHA-1: f22bd5554e0806c228f54d9f504fa1ea65d875ca SHA-256: 179bd009b6d5e118c7bff64ed47de57fee2ba4388294cbec4db17e59dc484f46
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 0.9980

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.tw/app/406889139/free-spins-coin-master-app-ios-game-hack PDF link annotation
    • http://hosoffices.com/ckfinder/userfiles/files/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/my-roblox-account-got-hacked-flamingo_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/robux-page_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/how-to-hack-any-game-on-roblox_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/guess-that-song-game-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/how-to-hack-roblox-windows-10_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/how-to-get-the-right-roblox-account-pin-hack_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/best-roblox-executor-free_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/hack-for-roblox-wont-get-banned_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/bloxburg-roblox-hack_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/how-to-get-free-robux-hack-2021_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_002_off00002fc0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FC0 22028 bytes
SHA-256: 2743a1bd553719aceceb5d2bc5eccb06359350f0541cf408c53dddb81e295ba9
font_01_sfnt_off00006084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6084 18176 bytes
SHA-256: 7a04ea1322d73f03f7683815be4e9f004787eae7d1b28008924f19d2df70de81

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