Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b03a0f863433691…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 00:50:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c554a89c841bb677b1e7db754520b499 SHA-1: 96a57d117474bb744d1054335491bf4e3f9200d0 SHA-256: 2b03a0f863433691ee26b0c69c94452792915af20fa1a0590484288b2d59f9ec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to known malicious redirector infrastructure at http://netcdn.tw/app/431946152/roblox-girl-game-hack. This lure is designed to trick users into downloading potentially unwanted or malicious content. The presence of a download button heuristic further supports the malicious intent of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/roblox-girl-game-hack In PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-apps-that-actually-work-quick-download_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/wurst-mc_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-promocode-hack-2021-pastebin_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-com-no-verification_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_off00002f11.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F11 22952 bytes
SHA-256: a958f7f2b2ba2323fa7204c767eb00bc3583e2817a7b7368d874e00da8da673d
font_01_sfnt_off000062aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AA 18608 bytes
SHA-256: 5fe15e5da966069483eb17055723a4f9c0a9d5b3cb284c17f806e1b338ce9336

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