Malicious PDF — malware analysis report

Static analysis result for SHA-256 d780c0b1bd3c7735…

MALICIOUS

PDF

34.7 KB Created: 2021-06-25 22:52:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c85fcb65450e4b6bd479bd4760b10347 SHA-1: 62b60f1f56c9195378027a5f6b1cbf3b8e5492e8 SHA-256: d780c0b1bd3c77359fcf6235bb504c57f17abee2dd438124dc496c45c762cffc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to redirector infrastructure, specifically advertising game hacks and free in-game currency. The heuristic firings confirm these links point to known malicious redirectors and lure users with game-related content. While no scripts were explicitly extracted, the nature of the embedded URLs and the lure suggest a phishing or malware distribution attempt.

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.co/app/431946152/how-to-know-if-your-hacked-on-roblox-game-hack In PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-trello-gold-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/nuevo-hack-de-robux-2021-realmente-funciona_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/no-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-black-hair-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/download-speed-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-fames_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-robux-for-free-2021_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_off0000301c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x301C 22348 bytes
SHA-256: a07519bd8e775ccadc1bcf9fead097a1eecd8c10f5d25d3be4351a8f34522b16
font_01_sfnt_off0000618a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618A 19296 bytes
SHA-256: bc4cb253639bb72829bef7e5018ca262558549a51a7c3a6a91776811ce57b8e4