Malicious PDF — malware analysis report

Static analysis result for SHA-256 a40964a84cc153bb…

MALICIOUS

PDF

35.5 KB Created: 2021-07-04 20:07:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: aa3b68a825e079ca5d6a51e91cf8122b SHA-1: 9c725c4db6e6952bb0ce64fe831ce5bee9e3462a SHA-256: a40964a84cc153bb07a8345cb029de2dfb5240434610c553027a1ea6ab5d62ff
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that offer game hacks and generators, a common lure for malicious downloads or phishing. The ML classifier strongly indicated maliciousness, and the presence of these links suggests the document's primary purpose is to redirect users to potentially harmful content. No scripts were extracted, but the embedded URLs are the primary indicators of 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/coin-master-mod-apk-game-hack PDF link annotation
    • http://lib.akpnbahtera.ac.id/repository/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-hack-into-your-own-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/1x1x1x1-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-robux-2021-no-human-verification_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_off0000335d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x335D 23348 bytes
SHA-256: ffb750648bf4a55e8b89e5e682eab1ec6e884a5f58fcd31e7c86a636bed96762
font_01_sfnt_off000067f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F0 18352 bytes
SHA-256: 8921705bb0180ef928bfc54a8bff441144a325a835df77ae2345570de02769c4

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