Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d74437bf4b6f9c…

MALICIOUS

PDF

47.5 KB Created: 2021-05-12 04:02:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 960d232072908582aa93d0ea2dc208e7 SHA-1: a5ac2a2025edf082a76189fbc6f844a9353763be SHA-256: 20d74437bf4b6f9c5557bbfd133e2507a95ed354893d5f2f140020814e20e1bd
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 0.9013

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/406889139/hack-para-coin-master-sin-verification-game-hack PDF link annotation
    • http://mb.its.ac.id/rbmb/repository/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/robux-for-kids_GM431946152.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/coin-master-levels_GM406889139.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.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_off00004d85.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D85 25872 bytes
SHA-256: ffaed62102d2d634367fdbbc8b886d714f098d82e33ec76c35b23f9853855b3e
font_01_sfnt_off0000878d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x878D 4804 bytes
SHA-256: da18282d5a4a2c16444ed24da1201c9b655d6e2fd687f339c9a94dcee9526257
font_02_sfnt_off000097f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97F0 18004 bytes
SHA-256: 5a160e1e3a55dba1252c7000e4eeb391006454b083247bbd903365d672dc9cd4

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