Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e25796a5a4415f8…

MALICIOUS

PDF

42.5 KB Created: 2021-05-14 00:35:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 54a03690b1db9723d4e88d2b983fc233 SHA-1: 55d354b88758584088ab36acb16cb79ed63ad7f4 SHA-256: 7e25796a5a4415f8eff6103ac423ff38c890007697a1412abf691f27eb970457
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a 'free generator / game hack' for Roblox, directing users to a malicious redirector URL. It also displays a fake CAPTCHA or human verification prompt to trick users into interacting with the malicious link. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of a malicious payload being delivered.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/roblox-redeem-card-codes-free-game-hack In PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/easy-robux_GM431946152.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://denpasarkota.go.id/new/public/ckfinder/userfiles/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49DD 25308 bytes
SHA-256: 5e4a7c616ccfe7285d06a4e90f6e6accaa859266bbdca6f2535a35a4e64f2d78
font_01_sfnt_off0000829a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x829A 18612 bytes
SHA-256: a80930eafb0fa49b70c8b74e6f01afa17dc8341ac3dd6991c9bc21ab4de62243

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