Malicious PDF — malware analysis report

Static analysis result for SHA-256 bca6359cace664a7…

MALICIOUS

PDF

50.8 KB Created: 2021-05-13 23:35:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: edfc7b54d417fa609751095348ae0bf9 SHA-1: 6e408d0ceee31b4b632b04bb44c78c7754492a1b SHA-256: bca6359cace664a76eaf65f3d4c5898ecbf0c2b68cec6fe43b43b58addfddc42
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector for 'free arsenal hacks'. The document body, though partially corrupted, also contains a reference to the same malicious URL. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9349

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/free-arsenal-hacks-game-hack In PDF document text
    • https://www.hotel-forsthaus.com/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/coin-master_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/coin-master-villages_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/minecraft-mod-menu_GM479516143.pdfIn 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_off00004d1b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D1B 34084 bytes
SHA-256: a6179454f25a5fdd9179de62decbe4401f458d4e7502f82dad4fe4cd2d48c4dc
font_01_sfnt_off000098c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98C4 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000a5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5D6 17836 bytes
SHA-256: d6079491610f92f53a6d508c31b9bd32bc6214f96ff8d9618faef176008c6c5c

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