Malicious PDF — malware analysis report

Static analysis result for SHA-256 07890bde97755837…

MALICIOUS

PDF

45.6 KB Created: 2021-05-14 16:55:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 96dfe1c30a8d79a385ddafcc8ebabdeb SHA-1: 9509d87a3b016d1412c7699eb614dc0fab6d93c4 SHA-256: 07890bde97755837cf30b2a8cdad9488abd37e85aedf2bc2bb9cc67789de41a2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier strongly indicated maliciousness, and the document contains multiple embedded URLs pointing to suspicious download sites, masquerading as free games or items. The presence of PDF_URI and EMBEDDED_URL heuristics further supports the malicious intent of redirecting users to external, potentially harmful content. No scripts were extracted, but the overall pattern suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/479516143/minecraft-windows-10-free-game-hack In PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/roblox-free-draw_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/robux-online_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/robuxmatchcon_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://code.giftcards.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a6f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A6F 25392 bytes
SHA-256: cbb5e0b5cddc33ac3e5a673ad631d0b92ac1315a2de20c8bf3d0813e7eeedc0d
font_01_sfnt_off000084db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84DB 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off00008ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED7 18524 bytes
SHA-256: 61f4e129dbb086a6f9797ef369c55cdd3b58d633037fca8f4f59eaf5785788a4

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