Malicious PDF — malware analysis report

Static analysis result for SHA-256 af3c766f294f13ab…

MALICIOUS

PDF

32.9 KB Created: 2021-07-03 15:44:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b34846bddf9d3f02718dc3c15c4d8c19 SHA-1: eafd2e990faa4eb69f1b8a249701a770b6bdd265 SHA-256: af3c766f294f13ab0dc71ebcb0fba61a6ded94acd599ca8cc773fa2264f72424
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The document body and extracted URLs indicate a lure for users interested in obtaining in-game advantages, which is a common social engineering tactic. The presence of embedded URLs and the ML classifier's high confidence score support the malicious classification.

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/406889139/facebook-coin-master-hack-game-hack In PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-coin-link_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/get-admin-in-any-roblox-game-hack_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-mster-free_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/cheat-engine-hack-roblox_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/rbxfree-com-free-robux_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_off00002d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D43 21920 bytes
SHA-256: f6b867af0c32a998b00bd5d6360ea5f6a71e743e7671d15b40f11ee7fbc28c93
font_01_sfnt_off00005dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBC 18324 bytes
SHA-256: de5d333ca2731b98d79dd38dcb89bccbbd759d9f6fb5713cf55863557c0b9bf7

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