Malicious PDF — malware analysis report

Static analysis result for SHA-256 52aaa63682885de5…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 23:50:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b0b8bd62c9b7d352f10868e6273f875b SHA-1: 65294fb78312623152021c155ffb34367cb5982d SHA-256: 52aaa63682885de52e5fc25a98eaca19766f3f70c4bb6a69aa1ad17a45f237f6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appears to be a game hack or generator. The primary link, http://netcdn.tw/app/835599320/tiktok-free-search-game-hack, is identified as a known malicious redirector. The document body and heuristics indicate a social engineering tactic to drive traffic to potentially malicious sites, likely for further malware delivery or phishing.

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/tiktok-free-search-game-hack In PDF document text
    • http://lib.smklabor.sch.id/repository/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-phantom-forces-pepsis-aimbot-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-make-a-free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/sign-up-today-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-roblox-visors_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-vip-server-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/cheat-engine-roblox-jump_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/new-hack-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-noclip-in-roblox-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-2021-app_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-german-flag-tshirt-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.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_off00003436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3436 22560 bytes
SHA-256: cb29313b7d8a3cb10b5ab82e5183a16c4e85316235b92f36f9a7e2cf1f95323a
font_01_sfnt_off000066a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66A4 18140 bytes
SHA-256: 2bb183fd648ddd96834cfc2f70595fb82d2747dd73dc8744742807c28d1c3dcb

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