Malicious PDF — malware analysis report

Static analysis result for SHA-256 1573c75f8c1d789b…

MALICIOUS

PDF

45.1 KB Created: 2021-05-14 16:05:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7340f8e21e490813289fa44d6f73e269 SHA-1: a2a6110f01b07de084c158145fe7e3b6c543161f SHA-256: 1573c75f8c1d789b58830d387800e6619cafc6428c39acb489c8b1edf816b010
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free currency'. The document body and embedded URLs strongly suggest a lure for users to click on these links, likely leading to further malware downloads or phishing pages. The presence of multiple redirector links and the ML classifier output contribute to a high confidence assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/406889139/coin-master-invite-friends-free-spins-game-hack In PDF document text
    • https://www.hotschool.com.au/images/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hotschool.com.au/images/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • https://www.hotschool.com.au/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hotschool.com.au/images/fake-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.hotschool.com.au/images/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • https://www.hotschool.com.au/images/free-robux-group_GM431946152.pdfIn PDF document text
    • https://www.hotschool.com.au/images/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • https://www.hotschool.com.au/images/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • https://www.hotschool.com.au/images/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • https://www.hotschool.com.au/images/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.hotschool.com.au/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hotschool.com.au/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://www.hotschool.com.au/images/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.hotschool.com.au/images/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://www.hotschool.com.au/images/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • https://www.hotschool.com.au/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://www.hotschool.com.au/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.hotschool.com.au/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://www.hotschool.com.au/images/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • https://www.hotschool.com.au/images/roblox-demon_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a5d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A5D 25064 bytes
SHA-256: 3fc914e5ce09ad30fc49455e87270cdb1e4ff91c9fadc6e5963c9253a471b564
font_01_sfnt_off0000840a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x840A 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00008def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DEF 18172 bytes
SHA-256: 894a1adcc26929d36602ddbdb38684ee1c59a25b9ea4d8d8786e8c61a01daafb

Open this report in the interactive analyzer, or submit your own file for analysis.