Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f010df3f729ae9…

MALICIOUS

PDF

45.7 KB Created: 2021-05-13 10:06:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 218298fa1564e6358d6287410b5f0f58 SHA-1: ba15b48507fc1689098e45f3608057f8a6b25ba0 SHA-256: 47f010df3f729ae9754a98051552b758471548ec4cb3921cd90b74cce76be86d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, including one disguised as a 'free generator / game hack'. The document body and heuristics indicate a lure to download a payload. While no scripts were explicitly extracted, the presence of malicious links and the ML classifier's high confidence suggest a high likelihood of a malicious workflow, likely involving a drive-by download or a further stage of infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/431946152/get-robux-today-game-hack In PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/bloxland-earn-free-robux_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_off00004a50.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A50 26156 bytes
SHA-256: 2abca780f5f463cf660e7fdd586afd6127e6db80b07c01a7126ddb08903c664d
font_01_sfnt_off0000852c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x852C 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00008eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EEE 18536 bytes
SHA-256: 52f9c859b3f332441204d5c114ca3069b0f0b255dc0376a71d348f06f556bd46

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