Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea740258dec9baf3…

MALICIOUS

PDF

33.4 KB Created: 2021-07-06 06:33:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5993ed5314ffcfb65977893945b4d0ec SHA-1: d55a65ee4046033dd58d947cd0ca2a0fe10f6d1e SHA-256: ea740258dec9baf387b895324f837f347a78c4acba7fbbce57abb9988ae709ee
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one specifically identified as a 'free generator / game hack' lure. The document body also contains similar luring text and URLs. This suggests the primary purpose is to trick users into visiting malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the presence of external links and the ML classifier's high confidence indicate a malicious intent.

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-spin-app-coin-master-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-unlimited-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-noob-outfit-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/trince3d-robux-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-jailbreak-nitro-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/get-free-robux-copy-and-paste_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/wild-and-free-id-roblox-code_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-free-png_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-escape-school-online-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/dupe-tool-hack-roblox-noo-virus_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-robux-no-phone-number_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-roblox-accounts-with-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/descargar-roblox-apk-hack_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_off00002ec6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EC6 22232 bytes
SHA-256: 1316ec671f57a2872ea4d9627505d22739567cffc7d67f372964d5fbb15cea24
font_01_sfnt_off0000603f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603F 18176 bytes
SHA-256: 19de47686a5a671c520268dc4f5b8264b0bb7386033903720c232ddf6b7fc3d6

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