Malicious PDF — malware analysis report

Static analysis result for SHA-256 167663d7efd61f5f…

MALICIOUS

PDF

37.0 KB Created: 2021-05-22 07:45:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ca2168e3d46a0b342a83a1d5e8b0479a SHA-1: 26df20eb5ab7c86587df826d26418011e6f5c7fb SHA-256: 167663d7efd61f5febbc0a4d56d0d0c4963deb4b785affc7673ccabf02572355
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game-related cheats and currency, such as 'free robux' and 'coin master hack'. These links are flagged as malicious redirectors, indicating a likely phishing or malware distribution attempt. The document body also contains a call to action to download, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/free-robux-no-verification-no-download-game-hack In PDF document text
    • https://www.zagi.hr/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • https://www.zagi.hr/files/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-free-spons-apk-2021_GM406889139.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_off000030ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30CE 25900 bytes
SHA-256: 3027e0fee62a2330f5cc35e95e66aef969aed9d464589947ccb74edd3f833631
font_01_sfnt_off00006cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB7 19180 bytes
SHA-256: 529ad809d39cb86513f1fd0a7c59ac13158e8644a31ce1f1c8620f9d5ad40971

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