Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7de7e867954c7b…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 09:20:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 645eb0f828c4464644036dac57002313 SHA-1: e735b8f4d6fd2e8603076362fde7cad3f835b7a9 SHA-256: 0d7de7e867954c7b956a1ed873f56342d92fbc854d3ded2b103317e5b461a276
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure and potentially malicious sites, disguised as generators for in-game currency like Robux and Coin Master spins. The document body and heuristics indicate a lure for free game items, which is a common tactic for phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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.tw/app/431946152/free-robux-no-human-verification-or-survey-2021-game-hack In PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/secret-robux-hack-roblox_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-get-free-20210-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/schoto-roblox-free-shop-hair_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/clean-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-get-roblox-builders-club-for-free-2021_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/krnl-download_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-free-coins-link_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
font_00_sfnt_off00003101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3101 21800 bytes
SHA-256: 8670ff6574e683b5d8c8df437b846a106c1ed6499848bb5b8563a65f2fd01f0c
font_01_sfnt_off00006121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6121 20028 bytes
SHA-256: a686843967d16d630a3d792aecd0df7810ef9440d33d67b3fe7886ce86e787de

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