Malicious PDF — malware analysis report

Static analysis result for SHA-256 a39cd8a9d7f43f3f…

MALICIOUS

PDF

28.5 KB Created: 2021-05-10 19:10:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0815069f3967b47be3f668e9c12531e6 SHA-1: d662fc3544d3906658b6bb9c0388dd8a1e6ef4bf SHA-256: a39cd8a9d7f43f3f7bbd3ebe54e8f392d12bceccf9465db00578e61e644010ed
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generator' or 'game hack' lures for popular games like Roblox. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection is the primary function.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9747

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 https://netcdn.xyz/app/431946152/roblox-system-game-hack In PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/jailbreak-script_GM431946152.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://mme.itk.ac.id/asset/backend/upload/ckeditor/files/get-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_off000022a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22A4 19780 bytes
SHA-256: 1d00a5920b0ef831237729de3a55889379f937dbc1d00c770415d605ffc75de8
font_01_sfnt_off00004c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C62 18328 bytes
SHA-256: 00842c74fa3c26a16ae32436b275a2230c03f77988fffeb41884b4851770a755

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