Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a4da5ca3e6463a…

MALICIOUS

PDF

45.8 KB Created: 2021-05-19 11:50:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f8e31e3e47a0c1d3ce52f8d42ade016f SHA-1: 6ea50966736a57d9a8b6d50c152b84158273bc2d SHA-256: 57a4da5ca3e6463a68f64ad987440c67417e88a303adbe0dd5dbaf5fca2e624a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9432

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 https://netcdn.xyz/app/835599320/tiktok-free-view-year-game-hack PDF link annotation
    • http://ratchadatitan.com/UserFiles/File/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-robux-real_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/pokemon-go-free-game-download_GM1094591345.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/roblox-com-free-robux_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_off0000492e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x492E 26816 bytes
SHA-256: e5cd5e82189bb96004f9f38d956107a8c154afd70f8ddf07290ca0a8048ceecf
font_01_sfnt_off00008607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8607 3124 bytes
SHA-256: d6dd29adb69da7f9a23a5e3791282a61e2f811794f560a0c409c8747766d9102
font_02_sfnt_off000090c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90C1 18144 bytes
SHA-256: 10630e209c31a46dbb70686292cbf2cbb522cf0b820505af3e68602bcbf1634f

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