Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9554d80ac24de6…

MALICIOUS

PDF

33.7 KB Created: 2021-06-18 16:21:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d83eb23e0080d24f196f3c3c302f03b3 SHA-1: 707493cd1ec048c2749ca5166a68fc54d134e3ce SHA-256: db9554d80ac24de6038e843aa93c98ec0d7f6b50f6995172bdcbb93e86d6daa9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a redirector lure, specifically linking to a 'free generator / game hack' URL. The document body also contains this URL, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector URL indicates an attempt to lead the user to a harmful site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-money-roblox-jailbreak-game-hack In PDF document text
    • https://www.taline.hr/files/accounts-that-give-free-robux-when-you-visit-it_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://www.taline.hr/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/como-hackear-robux-rapido_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/coin-master-daily_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • https://www.taline.hr/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/win-free-robux-robux-robux-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • https://www.taline.hr/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/free-robux-for-kids-no-verification_GM431946152.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
font_00_sfnt_off00002cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CF6 21964 bytes
SHA-256: b237cf2f32eee4512064d7016e036184bf3ae0cd41e09a6fbd83055934e768a4
font_01_sfnt_off00005d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D69 19480 bytes
SHA-256: efd722a87b7965b06526a60fb8732a67d408c99525bc3887876f8dbaf0c5e94c

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