Malicious PDF — malware analysis report

Static analysis result for SHA-256 907f69c44fb4040e…

MALICIOUS

PDF

35.9 KB Created: 2021-07-04 07:36:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e68aff21f5a85b66f08782b0e1c624b3 SHA-1: 8156fe4838d2625dbb2db682152654a03ce9a8ec SHA-256: 907f69c44fb4040e9cc296f9ee411f1a32a026b8395f3c484d80fcd8f7ba412a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game hacks and free in-game currency, such as Coin Master spins and Robux. The primary link, http://netcdn.co/app/406889139/coin-master-daily-free-spins-link-today-blogspot-game-hack, is flagged as a game hack redirector. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or scam attempt to lure users to potentially malicious sites.

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.co/app/406889139/coin-master-daily-free-spins-link-today-blogspot-game-hack PDF link annotation
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-app_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/get-robux_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/get-free-roblox-robux-on-therobuxapp-com_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/roblox-com-free-clothes_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/proxy-hack-roblox-download_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-to-use-cheat-engine-67-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-reedeem-code-roblox_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/app-store-coin-master-free-spins_GM406889139.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_off00003255.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3255 23348 bytes
SHA-256: 9bf7736a706dad1bce80ee1b47a4309e43e25ef8744925a1b2ad0855f1ad3821
font_01_sfnt_off0000670f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x670F 19156 bytes
SHA-256: 09b1cdc1283068c485bfced7c85533ce23b9c20e7767d1eac4088bba3ec2de37

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