Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa76bf0df81cb31…

MALICIOUS

PDF

49.4 KB Created: 2021-06-09 15:57:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: db711860c96e4979e7b097f405358b33 SHA-1: 93155ff668168bb3292cb4e08ded3d9b2b850b4e SHA-256: 8fa76bf0df81cb318ce44d7442e05f216dc7a67856e106ef534579a4dab03bb3
102 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 0.9796

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://netcdn.tw/app/431946152/roblox-robux-maker-free-game-hack PDF link annotation
    • http://103.68.2.77/__statics/gudangsoal/files/free-spins-coin-master-app_GM406889139.pdfPDF link annotation
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/a-tool-to-get-free-in-roblox-purchases_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/pubg-uc-meaning_GM1330123889.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-roblox-top-battle-games_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-robux_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/roblox-free-name-change_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F2 28364 bytes
SHA-256: 5de550874531e5941172d1653b3e2a6a1ae271a618049c39e48a92106220defc
font_01_sfnt_off0000936b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x936B 2916 bytes
SHA-256: 425f94d3906cee57d08c420ca43d794dc8331ccc16b39a8e1e86e73c5f169e01
font_02_sfnt_off00009d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D67 18680 bytes
SHA-256: 160646bea60af7f76622e827c25d52728a27e93dbe62da84fc0ccb069d174490

Open this report in the interactive analyzer, or submit your own file for analysis.