Malicious PDF — malware analysis report

Static analysis result for SHA-256 e457ea0eb7af0f12…

MALICIOUS

PDF

48.2 KB Created: 2021-05-16 13:05:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b2f75f2ebd7b5b7c662f14ec2d72292b SHA-1: 25fed51a83ce92838d5c695f948ef430463ecd74 SHA-256: e457ea0eb7af0f12025cce45aa1548345d5a730cc5db67f70c4d4112e905199f
200 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to trick users into clicking a malicious link. The link redirects to a site offering game hacks, which is a common social engineering tactic. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/406889139/coin-master-unlimited-free-spins-game-hack In PDF document text
    • http://www.pleiadisrl.it/images/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/freerobux-co_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/simplysarc_GM479516143.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/robux-gift-card-free_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_off00004d62.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D62 25092 bytes
SHA-256: 1eab218bb9b4e28437126a47b387dba663a03c55d977011239e216dbe67c35c9
font_01_sfnt_off0000872f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x872F 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_02_sfnt_off00009948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9948 18580 bytes
SHA-256: 57836ba4b334abfdb28f2107c3a7c20f60000720d7363886a05084d7f65c4915

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