Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a8eb648d3cf8ee5…

MALICIOUS

PDF

41.1 KB Created: 2021-05-11 18:32:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 848b3004e24f6db69ef7b65ef7a20239 SHA-1: 6b1b97d4e9a21c5bb7dd7cabf418d9ab53b33764 SHA-256: 3a8eb648d3cf8ee5df2feb44a98a0003f9e3dc10464bcca3cbc700070d932276
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free game items. The ML classifier strongly indicates maliciousness. The embedded links likely lead to further malicious content or malware downloads, serving as a primary vector for infection.

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/406889139/free-coin-master-spins-game-hack In PDF document text
    • http://apcupschennai.com/images/picture-roblox_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://apcupschennai.com/images/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://apcupschennai.com/images/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://apcupschennai.com/images/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://apcupschennai.com/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/mcpe-optifine_GM479516143.pdfIn PDF document text
    • http://apcupschennai.com/images/how-many-levels-in-coin-master_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_off000048a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A5 24764 bytes
SHA-256: fe3a9b6f0abcadfcfcd4abea89d5b87a320f146bc526847b393c6e1bf8aa3919
font_01_sfnt_off00007f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F99 17884 bytes
SHA-256: dbba0adc3b1b7bb8b2e5e51fec5d28ab169e2f7a165ed2a14d616932af559aea

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