Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c68e93914bc406…

MALICIOUS

PDF

41.5 KB Created: 2021-05-16 02:02:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8c830a74c7d5bb4d24b0389fafea1e44 SHA-1: 0a5b4767152b590abe6b0d0b5b4786f4bd2ae080 SHA-256: 19c68e93914bc4065ef2cfd24acf07e9474bd431d8a5c3a1d6e117bb05ec39b4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to 'netcdn.xyz', which is identified as a malicious redirector. The document body and embedded links promote 'free game hacks' and 'robux', a common lure for phishing and malware distribution. The presence of multiple redirector links and the ML classifier output strongly indicate malicious intent, likely to lead the user to a malicious site or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-free-robux-game-hack In PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/robux-best_GM431946152.pdfIn PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/master-free-spin_GM406889139.pdfIn PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.spapanggilanjogja.com/ckfinder/userfiles/files/free-spins-on-coin-master-iphone_GM406889139.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
stream_003_off0000484e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x484E 24552 bytes
SHA-256: 77b3bcc3f11dd69684b1c266120ac686ba6e83bf46183e53c7479ad6a5a0b1d7
font_01_sfnt_off000080ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80AD 18012 bytes
SHA-256: 3ef9e48aa3d97d4217e004f7625a8cbae9320a74231b80a01553f6433e422360

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