Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1bc80cd7b1aa344…

MALICIOUS

PDF

34.6 KB Created: 2021-07-09 01:09:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3c8a60ab8feb7c483a15ab608e65f05d SHA-1: 322c8e48b29fe1ea5bb01bb97bd9b6744adb3a75 SHA-256: e1bc80cd7b1aa344cd4f69a231af4027f31b3812425b0c1f4eb13d95ae1809c5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic firing for a game hack lure, linking to the URL http://netcdn.tw/app/406889139/coin-master-free-coins-facebook-game-hack. This URL is likely used to redirect users to a malicious site, potentially for credential harvesting or malware delivery. The ML classifier also flagged the PDF as malicious with high confidence.

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-free-coins-facebook-game-hack PDF link annotation
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/code-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/roblox-royale-high-how-to-get-free-diamonds_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/robux-points-free_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/jailbreak-roblox-free-money-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/free-swat-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/how-to-get-10-million-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/roblox-cheat-engine-admin-commands-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/easy-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-game-mad-city-with-check-chased_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/get-me-free-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
font_00_sfnt_off0000327e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x327E 22416 bytes
SHA-256: bb6f821ee148d74da87127229feab0a6ac9f1c1e9b583b2b0f3ada326817e2ad
font_01_sfnt_off0000649c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649C 18324 bytes
SHA-256: a6ed948cf24eb29c37458194fefc1f47b33ce3c9afefa5bc0bcdf74f8f7d5de4

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