Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa00b9309c067e63…

MALICIOUS

PDF

41.2 KB Created: 2021-05-21 14:35:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6b3a0c6286e12ad1c6cb9f4b24d54508 SHA-1: 1ffb141b862adf8efe76fa53406e9ccee24903c1 SHA-256: aa00b9309c067e6352373e1dd0b22f63c6c82e25c017379e7f520f897fd484cf
200 Risk Score

Malware Insights

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

The PDF contains multiple links pointing to known malicious redirectors, disguised as free game hacks or generators. The document body and heuristics indicate a lure to download or access content via these links. The presence of embedded URLs and the nature of the lures suggest an attempt to deliver a second-stage payload, likely through exploitation or by tricking the user into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-download-pc-game-hack In PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/tiktok-followers-free-2021_GM835599320.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/rbx-claim_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/roblox-free-download_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/free-t-shirt-roblox_GM431946152.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_off00003477.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3477 36324 bytes
SHA-256: f9d205473330fdcde37570b2da404e71601572ba7ee1e7e87148b542230a4c2a
font_01_sfnt_off00007ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC0 18828 bytes
SHA-256: 744b4361c7b50ab0c54bda7008ddb1699961116dc3c405c5ee3c1e77c5f65438

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