Malicious PDF — malware analysis report

Static analysis result for SHA-256 781a8fe90c4f4c27…

MALICIOUS

PDF

34.6 KB Created: 2021-06-29 06:22:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0425060f15ef8db33eede132c85b1367 SHA-1: 7b0350699e2fb5cff7f081fd7e7c3a7a521ea28d SHA-256: 781a8fe90c4f4c27bb8cddc1b8f19f4efec176e93f610c8df5f462aca57b2470
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body explicitly mentions 'how to get free infinite Robux' and includes the malicious URL, indicating a phishing or scam attempt. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a malicious redirector chain.

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-get-free-infinite-robux-game-hack In PDF document text
    • http://library.atim.ac.id/repository/roblox-hack-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/get-a-roblox-account-wiyh-robux-free_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-straight-away-cheats-for-money-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/doomspire-brickbattle-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/cheat-engine-64-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-robux-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-robux-on-roblox-mobile-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-play-paid-games-for-free_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-promo_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-treasure-quest-cheat_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/get-robux-free-button_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/como-tener-robux-gratis-hacks-2021-mayo_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-free-hack-download_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/synapse-x-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-robux-app_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_off00002f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F44 22800 bytes
SHA-256: b39e88f9cc4cb9c4a6ef654657ec39ad3b393a408a970353c65781c8b817164f
font_01_sfnt_off00006202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6202 19104 bytes
SHA-256: 74143413550ae2b1ecc20931c32693ecea332058bcc0729d8ada07ef536c5928

Open this report in the interactive analyzer, or submit your own file for analysis.