Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc76316b4c595ef…

MALICIOUS

PDF

44.6 KB Created: 2021-05-14 09:51:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 06a8f65f576a721ed3eec5f9b8679f13 SHA-1: d7bd7368af24c5004269531c12127f0b694412c4 SHA-256: 1cc76316b4c595ef20b63e07031eb849b5dae12700ee33881a8369926396873e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The primary malicious link is https://netcdn.xyz/app/406889139/fb-coin-master-hack-game-hack, which is designed to lead users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/fb-coin-master-hack-game-hack In PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/my-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/roblox-e-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ac8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AC8 24616 bytes
SHA-256: c5ee7d46456bf67d33fcb72a1a3584520c4244acc7695fedc1d95038bec94df5
font_01_sfnt_off000082d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D1 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off00008cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBB 18040 bytes
SHA-256: fbb613cf7ce1cb36a0a8d280c3838effdb84971329b91d5b96a8bc41d66c780c

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