Malicious PDF — malware analysis report

Static analysis result for SHA-256 257535dee450aeb6…

MALICIOUS

PDF

43.2 KB Created: 2021-05-11 18:00:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3f71ef6ae200f070514d105e3a1f1e71 SHA-1: 9c4d908429504248f2f6bfb217c38da871379ef8 SHA-256: 257535dee450aeb6d913a0eb36ec73c74ecb2998f188602630f3436fa302fabb
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 0.9969

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-get-creative-mode-in-minecraft-server-hack-game-hack PDF link annotation
    • http://librarysenior.com//repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/hack-download_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://code.giftcards.comIn 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_off00004d69.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D69 25116 bytes
SHA-256: 139a6cce34860affd45b5508a55ca9949df7659666eeacd37d359b526aad3ac5
font_01_sfnt_off0000866b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x866B 18332 bytes
SHA-256: b04b103692562b1630027eac5b017e7352fc4190b72d9da3724e53b3c4929e1c

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