Malicious PDF — malware analysis report

Static analysis result for SHA-256 874d056b30af6fe1…

MALICIOUS

PDF

34.0 KB Created: 2021-06-28 20:15:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 0a412794e458fb9644c1e9fa8ee1087a SHA-1: 0e71c3ed9ffc2f1feb0d5ba1b38d5c017de07285 SHA-256: 874d056b30af6fe1fb60e729158663a73a00c2abd9d2168f7ec69f6677a20a00
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for game hacks and free in-game currency, specifically targeting Roblox and Coin Master players. It contains multiple links to known malicious redirector infrastructure, such as http://netcdn.co/app/431946152/troll-hack-script-roblox-game-hack, which likely serves as a gateway to further malicious content or downloads. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/troll-hack-script-roblox-game-hack In PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/how-to-get-a-free-face-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-roblox-gift-card-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-robux-100-true_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/how-to-get-free-robux-2021-website_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/iron-spider-roblox-free_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-online_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/secrect-free-rooms-in-roblox-high-school_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-super-checkpoint-cheat-codes_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-apk_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
font_00_sfnt_off00002f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F19 21968 bytes
SHA-256: db24247c3a6499def2e1e4b42eb02fa3f4fc7f0d7978fb1f30412328cf4544f9
font_01_sfnt_off00005faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAF 19056 bytes
SHA-256: a6108965f9d2ee5ec2f75b3f142936a2e1fe690fd428bf6378c4a1caa5b9e7d7

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