Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac652c494c81103b…

MALICIOUS

PDF

40.0 KB Created: 2021-05-23 09:10:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a4d0d3da9a6fc1214fc3295a02b6f8d6 SHA-1: ad5c184547ba8cc61aec8762ef0e05760e14ecac SHA-256: ac652c494c81103b265bd4010e7e94aeac17164b3a2a0243319ba839276de896
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including one identified as a malicious redirector. The document body and heuristics indicate a lure for 'free Robux' or 'game hacks', suggesting a phishing or malware distribution attempt. The embedded links likely lead to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8015

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/431946152/how-to-get-free-robux-easy-no-download-game-hack In PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000036ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36EC 24240 bytes
SHA-256: dc45fa84224c4a8d1cab9716d4a3b5f7ea3b74d880e1490042d49d48ea5842b7
font_01_sfnt_off00006e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E39 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off000077fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77FA 19108 bytes
SHA-256: 7bc61c49a0b734df4d56b9cb8c894117daf111bfa68c773dcc76edca8f070452

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