Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a71739eae738c6d…

MALICIOUS

PDF

36.4 KB Created: 2021-05-23 22:37:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 730beda5e611604e3cd50eff86b59b28 SHA-1: e23177d1f9b5e84c35e6dd99c76b9096a949aba8 SHA-256: 9a71739eae738c6dc2bd6aea9f32c413e545416fb964b4f4891c3383bd44d53e
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, disguised as game hacks and generators, which is a common lure for phishing or malware distribution. The ML classifier also flagged this PDF with high confidence. The embedded links likely lead to further stages of infection or credential harvesting.

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/minecraft-dungeons-free-download-game-hack In PDF document text
    • http://ascom4.com/images/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://ascom4.com/images/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • http://ascom4.com/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://ascom4.com/images/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://ascom4.com/images/coin-master-free-spin-link-app_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_off00003365.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3365 24680 bytes
SHA-256: a32493ba7b936fdd3a2f1afe31e9b84488e3189aa0be894260f063c65e34d1d4
font_01_sfnt_off00006b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B71 18720 bytes
SHA-256: 9131f8ae0af3742f2152d673706180936bbe7c3ea282a1fb4d0c655f83237649

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