Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e554843f59e29b4…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 16:57:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 77a682b414aa50190ce123752872dfa9 SHA-1: 8b355cb19584b0aeac521483c2ea6c5f86e429d0 SHA-256: 8e554843f59e29b47459f83eb1dc76a4cfe2ace1f274f4b83a4fcc4a27f59a5f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free generators, directing users to malicious redirector infrastructure. The primary URL, http://netcdn.tw/app/479516143/how-to-get-minecraft-for-free-on-your-phone-game-hack, is associated with known malicious redirectors. The document body also contains numerous links to other PDFs hosted on slim.sisminkada.net, suggesting a chain of malicious content delivery. No scripts were extracted, but the document's structure and embedded links indicate a phishing or scam 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/479516143/how-to-get-minecraft-for-free-on-your-phone-game-hack In PDF document text
    • http://slim.sisminkada.net/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/does-roblox-ban-people-who-use-cheat-engine_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/cartoony-animation-free-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/hexaria-roblox-hack_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-stuff-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/buy-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-makeup-roblox-faces_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/hack-chip-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-com-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
font_00_sfnt_off0000321b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321B 21960 bytes
SHA-256: 04356850e115e35da7718e5700717954516c568741626663fb9128e8118830f0
font_01_sfnt_off0000624c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624C 18784 bytes
SHA-256: ab0cf905dc5988e311e4929c945d58dbde5e393d70311552a9ff538161641e37

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