Malicious PDF — malware analysis report

Static analysis result for SHA-256 4743483e0a8ac9f9…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 12:18:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 59387d46a299fe33eb126a4ea9fe8b70 SHA-1: 9c0986f3a39b121a12608c51363b73cefe1efc45 SHA-256: 4743483e0a8ac9f919957dac66d54cd85a9c045d4a356e7ef75050ef73f30f1d
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-online-hack-2021-game-hack PDF link annotation
    • https://www.ak-oroslavje.hr/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-roebucks_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-robux-no-hack-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-free-online_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/hacks-for-roblox-for-craftwars_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-execute-hack-scripts-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-hack-rabbit-simulaator-2-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-tiktok-likes-no-human-verification_GM835599320.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-get-free-avatar-items-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031fc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31FC 22712 bytes
SHA-256: fdcd724d06cf7c31a7675be468020718505d0e7f0e9e7b9c00e329d70f687de1
font_01_sfnt_off000064c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C1 18480 bytes
SHA-256: 6ca0512fe1902995c19dd8d16a5064896addc010cb175c56b83f50f9195b9e02

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