Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2abdbb17ef53a35…

MALICIOUS

PDF

50.7 KB Created: 2021-05-12 05:34:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4abc1e4582e815984deac1378306c678 SHA-1: 8302020b0c8de011bc87d3b1050c8892c1fe7088 SHA-256: e2abdbb17ef53a35389fd71bb911d16cb47fb9e3cbc17afb5f3d721efaa1fbf3
200 Risk Score

Malware Insights

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

This PDF document employs a lure of free game hacks and Robux to trick users into clicking a malicious link. The link leads to a fake CAPTCHA page, designed to prompt users into executing commands or interacting with the page, likely to download a second-stage payload. The ML classifier also flagged this PDF as malicious, supporting the observed malicious behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/robux-com-free-game-hack In PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/roblox-sued_GM431946152.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/freerobux-co_GM431946152.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/add-robux_GM431946152.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/hack-roblox-players_GM431946152.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/coin-master-unlimited-spin-and-coin-hack_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_off00004b31.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B31 28600 bytes
SHA-256: df5de67ff4a8d2f48e30aa6611ae53586e2a00fb1f6d3af792410bd1a3e45b94
font_01_sfnt_off00008d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D02 2824 bytes
SHA-256: 45bf821f81e84f4aa8d8374f492b182b36404f38b462c7dc471deaad6ab5c104
font_02_sfnt_off000096ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96AB 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3BD 18276 bytes
SHA-256: 15a0db03ecad41b32ad15729058012b5ee1d917146ec7af3e780186d41394abc

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