Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e43dacc85ca0b3…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 13:19:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 34bd6ba41cf66820796a4e23efd31de1 SHA-1: 3d9a92d8e0ef36e9a1ba5deeea71cb3158f0f8ce SHA-256: 40e43dacc85ca0b36230e481b21c9d966fb476efce9f094b9566d26804bddec5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, promising free game hacks and followers. The ML classifier also flagged this PDF as malicious. The document body and heuristics indicate a lure for potentially unwanted applications or further malicious content.

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/835599320/get-tiktok-followers-free-game-hack In PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/codes-to-get-free-money-on-roblox-treasure-hunt-simulator_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-roblox-gift-card-codes-generator-2021-may_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/daily-free-spins_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/pokemon-go-free-7km-egg-list_GM1094591345.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/power-simulator-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-get-free-hair-in-roblox_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_off0000308e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308E 22664 bytes
SHA-256: b06e7546e94707b6514c8b4d8b41f65bc8de2949d1817b315362b87f46a69972
font_01_sfnt_off0000635a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635A 18208 bytes
SHA-256: 2c913cd2b1a0bf54f87f8719ad814203ec2f1a1a3b8e3f6b6a76b442a86e84f4

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