Malicious PDF — malware analysis report

Static analysis result for SHA-256 f809601ddc2e3c0c…

MALICIOUS

PDF

45.4 KB Created: 2021-05-16 02:31:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8c09382fc539ebddfdbd3c24508a509e SHA-1: 62f21dde185f8c46503c7ad570f2645a20db4cc9 SHA-256: f809601ddc2e3c0cc669782a312e12ca6fb325bcdabc54565f3ac69513f27dc3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-codes-no-human-verification-game-hack. This lure is a common tactic to trick users into visiting potentially harmful sites. No scripts were extracted, but the embedded links and the ML classifier strongly indicate 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 https://netcdn.xyz/app/431946152/free-robux-codes-no-human-verification-game-hack In PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-free-models_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-hair-roblox_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-coins_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
stream_003_off00004d10.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D10 28420 bytes
SHA-256: 6ef321dc849164e9b7c67f0fdefa904b6bd5c0dcd4f4a22b5c8bab412b29db70
font_01_sfnt_off00008cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFE 19032 bytes
SHA-256: 7535c842b13f5ab09a8d1f6df205e44a1f60a7fdf3d88b4466f5e7b4ed5bfe6e

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