Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5392625ae069b01…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 19:54:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fd5e279f92dea2fd8b96ab36a28f983f SHA-1: e90747bfe1ff5939a6cc7112049311f4cf8e10cc SHA-256: e5392625ae069b01bdc513e761396fcad8c4143014cc54c0b0808454799d4451
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically advertising 'free generator / game hack' lures. The document body and heuristics confirm the intent is to trick users into visiting these malicious sites, likely for further exploitation or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/free-spins-coin-master-2021-game-hack In PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/free-money-glitch-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-by-changing-the-code_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/free-bc-roblox-2021_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/easiest-character-to-make-an-roblox-account-for-free_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/free-roblox-redeem-card-codes-2021-august_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-do-attack-seed-hack-roblox_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-free_GM479516143.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/break-free-dangerous-woman-tour-studio-version-roblox-music-code_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-codes-not-used-yet_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-java-edition-free-download-for-android_GM479516143.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_off000031a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A9 22516 bytes
SHA-256: 476cfa4562b4baa8e7ef63a50133640551d3b64881c1ecf8560c0bebb8856351
font_01_sfnt_off00006405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6405 18576 bytes
SHA-256: 461056571ca453647e3c969961301e9f27cf934f5ba6ca99c4dfe7c56792b440

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