Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce574d4b08f2207…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 21:42:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1211defb93833205ac45dcd5e3e991c1 SHA-1: 3679d41cb91b661b00617bb478477156bee8120f SHA-256: 9ce574d4b08f22077d5495e55cc6a928eefa478a60f119a6f08b4d18ad7f5f0f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary redirector URL identified is http://netcdn.tw/app/406889139/coin-master-hack-tool-2021-game-hack. This indicates a social engineering tactic to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of numerous malicious links strongly suggests a phishing or scamming attempt.

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/406889139/coin-master-hack-tool-2021-game-hack In PDF document text
    • http://katalog.ireyogya.org/repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-robux-on-roblox-in-2021-pycksel_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-boy-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-cheat-codes-mobile_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/robux-for-free-works_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-kill-hack-script-fe_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-script-hack-on-roblox-lumber-tycoon-2-money_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/adopte-me-hack-project-alpha-300-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/hack-game-pass-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/hack-para-tener-robux-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/robux-palace-free-robux_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_off000030ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30EF 23252 bytes
SHA-256: e9b060204f4072bf47cc7739103c6d20789cba335cf5aa2f6b4146154c164184
font_01_sfnt_off0000653a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653A 18480 bytes
SHA-256: 3dc977bc1210ceeedde7f87719dab6f525ca5e29bcd32cbe92ee8e1a0ab21cbd

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