Malicious PDF — malware analysis report

Static analysis result for SHA-256 433b35d26b327bbf…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 13:45:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0096e800e452b7dc771075f6ec5471f7 SHA-1: 46df20d6e99de0a39939de88f631898700a5217d SHA-256: 433b35d26b327bbf5992e6231f8ef79a656e56b526185d1c32724a218995450d
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to a known malicious redirector, masquerading as a 'free generator / game hack'. The document body and heuristics strongly suggest a lure to download potentially malicious content or visit a compromised site. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/431946152/free-robux-download-game-hack In PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-mobile-no-verification_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/pokemon-go-free-clothes_GM1094591345.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/coin-spin_GM406889139.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-infinite-health-hack_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-hack-any-account-roblox-2021_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-hack-roblox-without-a-app_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/robux-maniac-com-free-robux_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://if.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-hack-in-any-game-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000314d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x314D 22068 bytes
SHA-256: f5299776e51afbece0435d88d414c6528a4965d961865a54e78db1effe30f09b
font_01_sfnt_off00006253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6253 19296 bytes
SHA-256: 5f304289c35a5caca60ae5d5074bee34cff1925eeabd9956883fa8e616b1a204

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