Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f9d89e10d0de0e…

MALICIOUS

PDF

41.8 KB Created: 2021-05-17 05:57:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 835a9dbb0badbd67fe0c0d422037a8f4 SHA-1: e18c221d315994e09a5ddc37c70ab8c65b9b0aa2 SHA-256: f8f9d89e10d0de0e45959dc503ed637843996b4ab904cf5175041057d7d61672
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that are flagged as malicious redirectors, specifically advertising "free generators" and "game hacks". The document body, though partially corrupted, contains references to these lures and the authoring application suggests it was generated programmatically. The presence of these links strongly indicates a malicious intent to redirect users to potentially harmful content or phishing sites.

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/roblox-shirt-template-free-game-hack In PDF document text
    • http://tah-li.com/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/robux-download_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/free-robux-script_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/hackear-coin-master-android_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/buy-robux-free_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44D4 25160 bytes
SHA-256: 0f9f9c09c6565f9c4d213fae7ee72a96495a40d291942e867b7fd9bc20220047
font_01_sfnt_off00007ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED9 19000 bytes
SHA-256: d6f805bdffd03661be01a04ac852086d1abcf91b3aa9c1742de675ba95b2394a

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