Malicious PDF — malware analysis report

Static analysis result for SHA-256 2116450431cccda1…

MALICIOUS

PDF

44.0 KB Created: 2021-05-10 20:40:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5490f968711e7c21d7ffd45aec01c377 SHA-1: 465276d985079ad14846a4aa399f167161657392 SHA-256: 2116450431cccda155b95e36a005b13fa76a0feb646450d65051d137bd4db0b0
200 Risk Score

Malware Insights

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

This PDF document employs a lure of free game hacks and generators to trick users into clicking malicious links. The primary link leads to a known malicious redirector infrastructure. The document also presents a fake CAPTCHA or human verification prompt, likely to further coerce the user into interacting with the malicious content, potentially leading to further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/479516143/minecraft-hacks-xbox-game-hack In PDF document text
    • https://www.brainpads.com/images/robux-free-online_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • https://brainpads.com/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://brainpads.com/images/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/minecraft-net-free_GM479516143.pdfIn PDF document text
    • https://brainpads.com/images/getrobux-now_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • https://www.brainpads.com/images/mc-update_GM479516143.pdfIn PDF document text
    • https://www.brainpads.com/images/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • https://www.brainpads.com/images/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/how-to-get-800-robux-for-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_off00004882.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4882 23964 bytes
SHA-256: 00cb2766185f6341a2e9566e7aa97ef71b8594250ef09e24c1c97a10b7ecaca4
font_01_sfnt_off00007f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F31 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000088e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E2 18476 bytes
SHA-256: 08d143bbdffcf64d63a65049f265cbb68e766144a512c2d0a1cb0386676e8729

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