Malicious PDF — malware analysis report

Static analysis result for SHA-256 f33f11baac840334…

MALICIOUS

PDF

47.9 KB Created: 2021-05-14 21:00:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fcbbbe8b9e93e4eae9c46d7968773bb8 SHA-1: de2021c7c733bfd89127375e38fdcc1ecd8d4278 SHA-256: f33f11baac84033471bc0aa3c20cc80f349b87254d06962620e575d22a87f8c7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8715

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/coin-master-free-snacks-link-game-hack PDF link annotation
    • http://elsenorcafe.com.co/images/free-coin-app_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/robux-game-com_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000483e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x483E 24128 bytes
SHA-256: 639493ab0db77c24dc784676545c82946fbc8b83bb05d1b90f6e6ff5e463d88c
font_01_sfnt_off00007f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F59 4812 bytes
SHA-256: 8509f1138d188676ddf8671c0a98182a7650bb1daec55d2c59cf9303ffa1ab8a
font_02_sfnt_off00008fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FDD 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off000099cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99CD 17880 bytes
SHA-256: 09034ee7a1f9989932e9db65c2957a4d9f61d6fccc52a1ac5f57be2128ce07e5

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