Malicious PDF — malware analysis report

Static analysis result for SHA-256 d547b7661fff0604…

MALICIOUS

PDF

44.2 KB Created: 2021-05-16 13:09:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 53252c3cbdbededa4d1680af53d48145 SHA-1: d923b5ae70944ab7d1ad113eb5e517a484ee7086 SHA-256: d547b7661fff0604f2ae4a687a161220add0e348512548e933677eed66604283
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free in-game currency and items to entice users. It contains multiple links that redirect to malicious infrastructure, specifically identified as a game hack generator. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links confirms a malicious workflow. No scripts were extracted, but the document's primary function is to lead users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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/free-robux-pins-game-hack In PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/free-robux-place_GM431946152.pdfIn PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/freerubux_GM431946152.pdfIn PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/facebook-coin-master_GM406889139.pdfIn PDF document text
    • https://www.biofarshrimpskincare.com/ckfinder/userfiles/files/how-to-win-free-robux_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
stream_003_off00004f15.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F15 25584 bytes
SHA-256: f7c05bc5183dad0a9fc87c088513423ec3575cc20f3d59cdb1449a42dd9eb5e4
font_01_sfnt_off00008a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A78 18288 bytes
SHA-256: be7609bd7ddc69eb994b080447c8f3e95bc75a4b3676ce3cbb6c2619f3d9524c

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