Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a54a456d47600e…

MALICIOUS

PDF

34.2 KB Created: 2021-06-27 08:24:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 491f1f349bc37d00964b5e61211feee5 SHA-1: e66b0b71c7fc65a5cb4384b2d3624e688a3c86b6 SHA-256: 61a54a456d47600e9617e543902536476726be3e88ed2f3aa6412472ac6f7e90
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to a known malicious redirector infrastructure, specifically designed to lure users with promises of free Roblox items or hacks. The document body and heuristics confirm the lure is related to 'free generator / game hack' for Roblox. The ML classifier strongly indicates maliciousness, and the embedded URLs are the primary indicators of compromise.

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/roblox-gift-cards-codes-free-game-hack In PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/cheat-roblox-jailbreak-2021-tp-unpatched-may-2021_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-using-apps_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/how-to-find-free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021-pc_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/free-roblox-inspect_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/roblox-rogue-lineage-hack_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/roblox-first-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/how-do-you-get-a-free-dominus-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/hack-roblox-apk-pc_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/roblox-roblox-hack_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/hack-para-trials-simon-says-roblox_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-slx-roblox_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/roblox-hack-pastebin-all-games_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/free-robux-and-tickets_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/games-that-actually-give-you-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/free-robux-just-username_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-35-000-robux_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/new-roblox-hack-script-execution_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/roblox-hacks-com_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
font_00_sfnt_off00002f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F56 22228 bytes
SHA-256: aaf8ffa8376ee6d7401115a0f259db2337b8516dd88265b5afd29b0df63c8492
font_01_sfnt_off000060a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A6 19048 bytes
SHA-256: 229bc07457b2dcd0d88eecddd748bd4cc9a419ad288e1341d6ef7fdc628423be

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