Malicious PDF — malware analysis report

Static analysis result for SHA-256 0acbf4cf2af6a8fd…

MALICIOUS

PDF

45.4 KB Created: 2021-05-13 18:23:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b2bd906a38fe017605232c6961e79c62 SHA-1: 5bc75db0d3db3ca0ea3262436fa794793118fc78 SHA-256: 0acbf4cf2af6a8fdf38be901fe06a9d6a7801a79769120e78df5dfde8bad723e
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 0.9507

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/send-me-500-2021-spins-game-hack PDF link annotation
    • http://itc-nekretnine.hr/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/coin-master-rewards_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/woman-roblox_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-robux-generator-no-survey_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
font_00_sfnt_off00004be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BE9 25632 bytes
SHA-256: 007838b8f71b09a6417552266081eaa2e9ede4fc2e40c736364ef9a0bdfdc0ad
font_01_sfnt_off00008510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8510 17960 bytes
SHA-256: dff02ceeee56d5f4ef3a776903bc3b56e18e6822a65b0acf827e633c14aecd45
font_02_sfnt_off0000a631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA631 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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