Malicious PDF — malware analysis report

Static analysis result for SHA-256 663963cda6754485…

MALICIOUS

PDF

32.0 KB Created: 2021-07-19 09:19:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5b10f53a2e5f0acbbbe63225886576b6 SHA-1: 3103028fff78eea268c7b5f5dd0e98203bc2b5e9 SHA-256: 663963cda675448507fdd80f9046d2f1ba5b3336dce9051544f92606739ccee9
160 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs that redirect to a known malicious domain, masquerading as a game hack generator. The document body text and heuristic firings confirm this lure, aiming to trick users into clicking through to potentially harmful content. While no scripts were directly extracted, the PDF structure and embedded links suggest a workflow designed to lead the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9466

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/406889139/how-to-get-free-spins-in-coin-master-game-hack In PDF document text
    • http://vintageorangeville.com/userfiles/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://vintageorangeville.com/userfiles/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://vintageorangeville.com/userfiles/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000028b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x28B9 22992 bytes
SHA-256: b43300c83e41f288d170b09d7edf9654d97463c843bc20fcaf4860fc85fc4e5c
font_01_sfnt_off00005c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4A 18052 bytes
SHA-256: 52b27d49d658c5dd219fe1685a79a71966a386845fdc62a41335e5719e4d5001

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