Malicious PDF — malware analysis report

Static analysis result for SHA-256 15dd79715c287e79…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 01:05:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 0c5f11c41b338fab7092f1ccdf214009 SHA-1: 7d0151396a74eb4799a01a6f12970c8f6d17b961 SHA-256: 15dd79715c287e799468f2afdc5747103e2c4115efac1272a3809218b034f904
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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 http://netcdn.tw/app/406889139/free-spins-coin-master-haktuts-game-hack PDF link annotation
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/roblox-how-to-get-free-clothes-without-bc_GM431946152.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/free-code-for-huge-cat-pet-in-roblox_GM431946152.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/pubg-uc-hack-software_GM1330123889.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/free-100-robux_GM431946152.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-blossomu-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32F0 22876 bytes
SHA-256: 7dfa8be7d67e6a58d5aee5cb1434a7e6cb7cd52298c22e5cd06a4127f780ed87
font_01_sfnt_off0000666e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x666E 18484 bytes
SHA-256: f7b6576a3f9b0348374d3a5fd8e4bb71623a7ab150aa44cb754c73ac43401ac4

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