Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9efde5180c16728…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 19:15:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 219276fabc83291df001415b5ca580eb SHA-1: 04f235395821a132e699ceaaca60986c5790f33b SHA-256: d9efde5180c16728b314a36f43e138e6754e87806a49a47b6be606ebdf068825
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/free-spins-for-coin-master-2021-game-hack PDF link annotation
    • https://allhimalayantreks.com/userfiles/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/robloxcom-free-kkk-k-k-k-k-m_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/hacks-para-tener-robux-gratis-2021_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-hack-teleport-in-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-no-human-verification-for-android_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-pet-treats-coin-master_GM406889139.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_off00002ffc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FFC 22856 bytes
SHA-256: 573fe51eb8cf4c69b4b6911132e37fdac0f319f8f6ada12378fab56d011cb40d
font_01_sfnt_off00006346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6346 18576 bytes
SHA-256: fb0fb59ed2c1a9034e606a4b9af272ef40c933264071e94cfd5fd7ab3c408864

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