Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7afeeff81c1ced8…

MALICIOUS

PDF

36.2 KB Created: 2021-05-23 06:37:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2b1fcf9eb02dc26eb0f6bbbdf34fab4d SHA-1: ac13cf489899ef00f9006494c0f042c646665bd0 SHA-256: a7afeeff81c1ced8f3fb5c6e889ea76ba2343fd73b8b26a723f81f06fe1eb2a3
160 Risk Score

Malware Insights

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

The PDF contains multiple links, including one that redirects to a 'free generator / game hack' lure. This heuristic, combined with the ML classifier flagging the PDF as malicious, indicates a social engineering attempt to trick users into visiting malicious infrastructure. The embedded links likely serve as a lure for initial access via spearphishing, and the PDF's structure suggests it may exploit vulnerabilities or use embedded scripts for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/479516143/real-minecraft-for-free-game-hack In PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/free-roblox-groups_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
stream_002_off000033b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33B9 25508 bytes
SHA-256: e20cbdaadd387e7b28b2c51a785157ef3cb2064ef735792ed08f53b24c6c0d02
font_01_sfnt_off00006dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBD 17784 bytes
SHA-256: d9b0d0c4c4ee4a540b7fb0061982a790ffe87580883f4fb909ed1eb0697febb4

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