Malicious PDF — malware analysis report

Static analysis result for SHA-256 5abd3955386842dd…

MALICIOUS

PDF

46.0 KB Created: 2021-06-08 21:29:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1e61b17f214f66e0cc9a51215063f337 SHA-1: 42ee04a745e0643cd32fbee1014192c0f335253b SHA-256: 5abd3955386842dd7e915a726604676e0328c2f18806f6c3c08211927368ad9b
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free Robux, directing users to a malicious redirector URL. The document body and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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-robux-hack-generator-2021-that-i-can-download-game-hack In PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/roblox40com-robux_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-2021-no-human-verification_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
stream_004_off000051dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51DD 25452 bytes
SHA-256: ec6a39d2b84566e8df92c547d7deff7bc834eb0578d836e3780f03d10a6726b4
font_01_sfnt_off00008d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D03 19664 bytes
SHA-256: 13f98d06df3e9696ef515cf4215627a04b0bb72b39fab2a72a05cbca2d14e9a7

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