Malicious PDF — malware analysis report

Static analysis result for SHA-256 27dcca68aaf0ffaa…

MALICIOUS

PDF

35.2 KB Created: 2021-05-22 00:45:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f74cc80fb83e18628207e37a47fc506b SHA-1: 0695764d53e699e3e2728d3ced206a768db3e623 SHA-256: 27dcca68aaf0ffaa26c48342e228ea9ff465f2622a815c08552fe61a5763604e
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. The primary lure directs users to 'netcdn.xyz', which is flagged as malicious infrastructure. The document body also contains a call-to-action phrase, reinforcing the deceptive nature of the PDF. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-bedrock-free-game-hack In PDF document text
    • http://5346000.com/images/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://5346000.com/images/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://5346000.com/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://5346000.com/images/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://5346000.com/images/coin-master-spin-hack_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_off0000310a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x310A 24400 bytes
SHA-256: 0bb08081c4bd1751c9fc6e44ee57a079546a038c100debd1c377ab36dbdd8bfb
font_01_sfnt_off0000680d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x680D 18268 bytes
SHA-256: 421dc37018d5e6f1467ffbccbacebf5894202cb157ac672e86022266516fa266

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