Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dcb8913e9aef193…

MALICIOUS

PDF

45.7 KB Created: 2021-06-11 04:33:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1e226a300b003783c7e32ca806aaad6e SHA-1: cbbe2ea32b63753d98ed0b6f852ec0024b4ba5bc SHA-256: 9dcb8913e9aef1935ab76cb518d357bc0fc9de11e293a6bc0c40a0d7ed820b8d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The document body and heuristics indicate a lure to download potentially unwanted or malicious software. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/booga-booga-roblox-hack-download-game-hack In PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/cheat-codes-for-roblox-mad-paint-ball_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/hack-for-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/omo-recuperar-una-uenga-hacker-en-roblox_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/smiling-girl-roblox-free_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_off0000520c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x520C 25768 bytes
SHA-256: 715dc2b54a7aebb8337122e8237a5e6dc493cbe65bf9367a7be719b0c75e81ce
font_01_sfnt_off00008dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DFA 18976 bytes
SHA-256: 01e185e7055c35e606543a03876a9f2451f5b7a09e46d0c205f291d14578d46a

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