Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5771ec33a6d9412…

MALICIOUS

PDF

37.0 KB Created: 2021-07-06 10:08:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: be8a01d64bc5fe9976481b79cf67106a SHA-1: 87344db0c90c82c569022b8708dbfb7d0f5cf4b4 SHA-256: c5771ec33a6d94125ec4965a242e3dbf153f526627b02c4b28b4e35f5093cd20
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-money-links-coin-master-game-hack PDF link annotation
    • http://library.umuslim.ac.id/repository/roblox-free-shirts-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-no-veracation_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-without-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/robux-hack-911-pastbin_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-diamonds-in-royal-high-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/treasure-hunter-simulator-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/guild-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-friends-with-stevie-on-roblox-funny_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/como-hackear-a-la-gente-en-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-give-away-codes-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-not-including-survey_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_002_off0000378a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x378A 24084 bytes
SHA-256: 92f1fa1166a1540c6d536bd3e8915327c3206a4d822395544b3f15bfde848ee0
font_01_sfnt_off00006e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0F 18348 bytes
SHA-256: d1e3fa9b345845750c3361cd5ba2c4bb407e1fff22b4faa08696458df1a8669f

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