Malicious PDF — malware analysis report

Static analysis result for SHA-256 18ecbd4788119a22…

MALICIOUS

PDF

47.7 KB Created: 2021-06-11 00:12:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 31f419082da4c087b0843eeb92cea8de SHA-1: 94013fced71fbe49d60d2c126a2001dac8504ca3 SHA-256: 18ecbd4788119a22471d4c4a5df521287fe5d7f01ef8eb83c35d79c63f6455ac
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 0.9769

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.tw/app/431946152/roblox-com-free-robux-obby-game-hack PDF link annotation
    • http://mtsn-baranti.com/perpus/repository/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-make-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-adopt-and-raise-a-baby-hack_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/new-roblox-swordburst-2-hack_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-hair-in-roblox-all-names_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-block-someone-on-coin-master_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_off000051a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51A5 26152 bytes
SHA-256: 43dd7a2370702c882d242837e2845e579821324bab564e463eccb91bea7b83a2
font_01_sfnt_off00008d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7F 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9730 18528 bytes
SHA-256: 65e47b4186140e8232c53fb41e2b32002bfc727e9ab7810e0d587b8a2d715fc5

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