Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b332ed10b23f4a2…

MALICIOUS

PDF

47.3 KB Created: 2021-05-19 01:37:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b45706cd84c35ab65edefd1bbf1a429f SHA-1: 900c65fa41bc24f800b8ce9aa1e6bde677a410a8 SHA-256: 2b332ed10b23f4a27c1b453abe36661d1a846cbd33a1d51870792556502414e4
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The document body, though partially corrupted, contains references to these lures and embedded URLs. The presence of a password-protected archive lure suggests an attempt to bypass security scanning by encrypting a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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-for-free-game-hack In PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/cm-spins_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/http-bit-ly-coin-master-hack_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d2f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D2F 27908 bytes
SHA-256: 80586a23b44047a4dd6571de33f2dc211dd9fae3893d724864701d769addef98
font_01_sfnt_off00008be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE4 3092 bytes
SHA-256: 3811f2fb1880daf4953efcc9c7427d9b438bced237490b00be4a6ec3ecea79e0
font_02_sfnt_off0000968e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x968E 18268 bytes
SHA-256: 421dc37018d5e6f1467ffbccbacebf5894202cb157ac672e86022266516fa266

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