Malicious PDF — malware analysis report

Static analysis result for SHA-256 81023bd724076086…

MALICIOUS

PDF

42.7 KB Created: 2021-05-19 19:53:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e6c022ade64c7b00f4fd58c2337370fe SHA-1: 399454e0a56c781b7f4e0c1bb00d80dcce70ac8c SHA-256: 81023bd724076086adb4d3c05f0969f6efd5b2d5070d97261e6f9dc921369732
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as game hack generators. It also presents a fake CAPTCHA, a common social engineering tactic to trick users into executing further malicious actions. The ML classifier strongly flagged this PDF as malicious, supporting the observed malicious links and lures.

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/how-to-get-free-robux-inspect-game-hack In PDF document text
    • https://www.manmed.info:443/images/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/games-like-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-items_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/win-free-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/minecraft-dungeons-free-download_GM479516143.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_off000048ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48EC 25744 bytes
SHA-256: 94e450d8ba0bbea6916907ead1f284b3a76ea2501b1f558bd8ec5732406a4b7e
font_01_sfnt_off000083db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83DB 18460 bytes
SHA-256: 22a12ce8296f83c6fe51ec3cff30028b7ec5cf0a22e0606da6e2b470e25d3737

Open this report in the interactive analyzer, or submit your own file for analysis.