Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ce1eafe8272f3e…

MALICIOUS

PDF

51.6 KB Created: 2021-06-11 07:50:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9fb6d3d42f345b5f323f977280f73f59 SHA-1: ea6e47c280b204157eec99b8672994546f254dd4 SHA-256: e7ce1eafe8272f3e9e2792c135198e7bfd022dea68569c9a75aeea181c47576a
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document employs a lure of "free valid Roblox promocodes" and a "game hack" to trick users into clicking a malicious link. The document displays a fake CAPTCHA or human verification prompt, which is a common tactic to coerce users into executing further actions. The embedded link directs to known malicious redirector infrastructure, likely serving as a gateway to a second-stage payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9685

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.tw/app/431946152/free-valid-roblox-promocodes-game-hack In PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/roblox-free-adiidas_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/free-exotics-roblox-assassin_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/roblox-tbc-free_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.misceren.com/home/misceren/public_html/upload/files/how-to-hack-big-brother-roblox_GM431946152.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_004_off00005210.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5210 26924 bytes
SHA-256: 04e60c38655928c089230db58b2b2292e5fa9fabe41a0dcc5be8d2f1de510fb8
font_01_sfnt_off00009100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9100 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00009aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA6 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off0000a4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B6 19016 bytes
SHA-256: b131387dc4ba900d7f7a2a67711c7504df0555d533ef1b8807b3990c5dd572ca