Malicious PDF — malware analysis report

Static analysis result for SHA-256 569dbb5b7697f95e…

MALICIOUS

PDF

42.1 KB Created: 2021-05-11 15:36:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d6dfe5f283456497908b4143c9046dc4 SHA-1: bed9b9ab0ddd3a70a6f905fae4f9e4bac1980913 SHA-256: 569dbb5b7697f95ecaf35b0b4d7d61bbcb00d3cffe3c2fa485312f1ba2ef4a2a
142 Risk Score

Malware Insights

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

The PDF contains numerous links to websites that promise game hacks and free in-game currency, such as 'free-robux-hack-no-human-verification-or-survey'. This indicates a lure to trick users into visiting potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-game-hack PDF link annotation
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/coin-master-hack-version-download-ios_GM406889139.pdfIn PDF document text
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/grab-points-login_GM431946152.pdfIn PDF document text
    • https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/coin-master-free-spin-facebook-link_GM406889139.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_003_off00004c44.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C44 24540 bytes
SHA-256: b10662bf17673b5ec6949c2f6be1a46917f1f4b2103f4d1bde306db7e897cdac
font_01_sfnt_off000083e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E5 17740 bytes
SHA-256: 0307ae1fdf286ae380d36e270ef5c992f348f7a5470d5d5ce449782a5f21d577