Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa78e01702f7aafc…

MALICIOUS

PDF

30.8 KB Created: 2021-07-19 15:36:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 12ad43f401a419728bd9d12f395e8572 SHA-1: 269d0f148dd8792124d72c663ab3de3fd6366fba SHA-256: aa78e01702f7aafc82889515570fa91e0d28976773a84057dbbea82890cb66a5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded links, including one pointing to a known malicious redirector infrastructure associated with 'game hacks' and 'Roblox account hacking' lures. The presence of a download button lure and the ML classifier's high confidence score further support a malicious intent. The document likely aims to trick users into downloading a second-stage payload or visiting a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9460

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.tw/app/431946152/how-to-hack-peoples-roblox-accounts-game-hack In PDF document text
    • https://setda.denpasarkota.go.id/new/public/ckfinder/userfiles/files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • https://setda.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • https://setda.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://setda.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • https://setda.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://setda.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-apk-download-v1-144-2-free_GM479516143.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_off0000231c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x231C 21960 bytes
SHA-256: 5ff67db7d5750ebd5ce7c1fea6905809202a93fa5ef52231d3735a5f8de71d86
font_01_sfnt_off000053b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53B3 19108 bytes
SHA-256: 3cca992b89e738ca0e0fc5d204c59383ee6ad597b33237d2d42885b29afa3b03

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