Malicious PDF — malware analysis report

Static analysis result for SHA-256 015e5315f7ee0e2b…

MALICIOUS

PDF

41.9 KB Created: 2021-05-23 04:39:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6017249b173ee79032ff73e91a9a6678 SHA-1: 543ed76c4d4e84386c2a2a74f6c1e2cd2ba6b744 SHA-256: 015e5315f7ee0e2b9f777ece212e3003ba9a8d71c5dffd57272d47e918bfbcd7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, disguised as "game hacks" and "free generators". The document body and embedded links explicitly mention "free Robux" and "game hack" to entice users. The ML classifier also flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7527

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/how-to-get-free-robux-without-verification-or-surveys-game-hack In PDF document text
    • https://kldcardio.ru/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://kldcardio.ru/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://kldcardio.ru/images/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://kldcardio.ru/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://kldcardio.ru/images/how-to-get-minecraft-for-free-on-android-device_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_002_off00003484.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3484 26456 bytes
SHA-256: 6b19cc7c9c3b076ddb86ce714eaf1b87cfee1fd60570c2d1aa7d6a9ff7b5da2b
font_01_sfnt_off0000725c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725C 3656 bytes
SHA-256: 63a179d8a9645bea05c6d53b1776faf4e4a7281930de6cf484e639846bec2e20
font_02_sfnt_off00007f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F16 19424 bytes
SHA-256: 30551668946d9b3d80fdd5a427c07e5f2c52faec585ae3c44dbbbd4d67cc7463

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