Malicious PDF — malware analysis report

Static analysis result for SHA-256 612eb87ffd1bc4ff…

MALICIOUS

PDF

43.8 KB Created: 2021-05-10 17:07:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1974e1cfdf8043da608d62ff2ff5f432 SHA-1: 82d6cfc2454f233e111b0ac5282b63c4e5c97cc7 SHA-256: 612eb87ffd1bc4ff7824a8bc17544ecff78f5b1a74f42d83ef583ba338bbe009
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 0.9969

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/479516143/minecraft-xbox-one-edition-digital-code-free-game-hack PDF link annotation
    • http://tapinkab.go.id/assets/CKImages/files/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://tapinkab.go.id/assets/CKImages/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://tapinkab.go.id/assets/CKImages/files/robux-rewards_GM431946152.pdfIn PDF document text
    • http://tapinkab.go.id/assets/CKImages/files/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://tapinkab.go.id/assets/CKImages/files/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://tapinkab.go.id/assets/CKImages/files/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://tapinkab.go.id/assets/CKImages/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://tapinkab.go.id/assets/CKImages/files/ww-roblox-come_GM431946152.pdfIn PDF document text
    • http://tapinkab.go.id/assets/CKImages/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://tapinkab.go.id/assets/CKImages/files/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • http://tapinkab.go.id/assets/CKImages/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://tapinkab.go.id/assets/CKImages/files/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://tapinkab.go.id/assets/CKImages/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://tapinkab.go.id/assets/CKImages/files/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://tapinkab.go.id/assets/CKImages/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://tapinkab.go.id/assets/CKImages/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://tapinkab.go.id/assets/CKImages/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://tapinkab.go.id/assets/CKImages/files/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • http://tapinkab.go.id/assets/CKImages/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://tapinkab.go.id/assets/CKImages/files/how-to-get-a-lot-of-robux_GM431946152.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_003_off00004ce9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CE9 25256 bytes
SHA-256: ca337eabd0caba4c2a0e7f64ef5b65dc8ba5eb0817367feb9385b57c694b09ec
font_01_sfnt_off0000869f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x869F 19008 bytes
SHA-256: fdc182bbb0097015eb5c04957e9722c28c9e7580ee65fff8630002b28e8f7f3d

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