Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac2fea5df8aaff3…

MALICIOUS

PDF

46.8 KB Created: 2021-05-17 08:16:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5f121cb654ea8a0cac6dde2bb75d8561 SHA-1: 65a54ffff36679d317c2e0f87e6872462d98e10d SHA-256: eac2fea5df8aaff3a120d6e76d8c0f8a9377b4cb01bd6469a9cf4b7fec4387f3
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 0.8948

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/coin-master-hack-without-verification-game-hack PDF link annotation
    • https://www.donjastubica.hr/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-free-robux_GM431946152.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/coin-master-hack-tips_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/robux-gratis_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_off00004a1b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A1B 28072 bytes
SHA-256: 1de7a55d85ca99ca869b879b1b53a4dbae5d4bdc0eff3e8f99303a74ad74965c
font_01_sfnt_off00008ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB5 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9467 18356 bytes
SHA-256: dc73d1475286564dbbcfd7fe1f785306788ee44bec01666c46f1ad38f7aa2791

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