Malicious PDF — malware analysis report

Static analysis result for SHA-256 764fa2fa08a003e4…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 07:36:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1e448be08649350110d3610e00b72461 SHA-1: 1f7daf48fecfc69b6046dc865c0a32157bb6ff8d SHA-256: 764fa2fa08a003e459bf428aff7be2c3cb71c541805fbd58243b1393087a3985
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to a known malicious redirector, specifically designed to lure users with promises of game hacks and free currency. The document body and heuristics confirm the presence of these deceptive links, indicating a phishing or scam attempt. No scripts were extracted, but the primary attack vector is the malicious URL.

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/haktuts-coin-master-today-game-hack In PDF document text
    • http://library.stikessuakainsan.ac.id/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/but-lynk-said-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-deals_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-wearable-wings-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-hack-menu-ios_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/pastebin-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-robux-with-no-catch_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-free-roblox-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-roblox-hacks-for-free_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/snippet-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-roblox-neon-rideable-pet_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/apps-for-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
font_00_sfnt_off000031c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C0 22680 bytes
SHA-256: f5b4a6fd1bb65e00a0bdd5ac1986e351610bf92f3f781ff4d796a67f3c0a0517
font_01_sfnt_off00006490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6490 18500 bytes
SHA-256: de4287b4d7c6ca7204c59268274f8693e9d2fc3133188a60d6bd2877f4507d7b

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