Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd25b2a1571aa8f…

MALICIOUS

PDF

43.9 KB Created: 2021-05-17 05:41:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1957bfee81f8dcd14c65418f62419d49 SHA-1: 2c4cfd4932862eafb62368c1dd3534211109c444 SHA-256: 1dd25b2a1571aa8f190f1e36d2a1684ae03595577c23610b8ea44bd186598c91
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 0.9648

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/offers-to-complete-and-get-free-spins-in-coin-master-game-hack PDF link annotation
    • https://www.donjastubica.hr/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-old-avatar_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_off0000489d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x489D 23952 bytes
SHA-256: ce7a9bb3e85ad36e90932990e24affb7388625aa7a09ca641134445fdab1e4f8
font_01_sfnt_off00007f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1A 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000088cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88CC 18396 bytes
SHA-256: a437ba12f7042a0a87041fbc8ef35ebb1425d90343bc1c02dd6b536075df2014

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