Malicious PDF — malware analysis report

Static analysis result for SHA-256 d88db48530f727c7…

MALICIOUS

PDF

46.8 KB Created: 2021-06-03 07:25:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2ad2ec809a239552df814dae59d0a344 SHA-1: af67ffb7ea27f9974b334ce7dd00525fb541ba16 SHA-256: d88db48530f727c7571e46ca73473df9a8cebc332140c3e3e32647c2e581512f
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 0.9748

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.online/app/406889139/coin-master-free-link-game-hack PDF link annotation
    • https://www.knjiznica-oroslavje.hr/files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/wurst-download_GM479516143.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/robuxglobalcom_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-robux-place_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-game-hack-version-download_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_004_off00004cae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CAE 27900 bytes
SHA-256: 2e814b746215c3e6965b19089bc4bb59459fb96dd57eb49a145059007de8a876
font_01_sfnt_off00008b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B87 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9538 17880 bytes
SHA-256: 5ce88b684446e36e89a0643934549b22fce1d776877bbe9d9a558feafde7429d