Malicious PDF — malware analysis report

Static analysis result for SHA-256 9120da65967c431b…

MALICIOUS

PDF

34.9 KB Created: 2021-06-28 04:30:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7130b290e727d5b5403f8a26b0884bf3 SHA-1: 5c3c2ecc0bc985a86beb7b64fc36882570fd0f96 SHA-256: 9120da65967c431bf82d745dcbb961a3e3ce9fc907d21da4a0e840f7ed9b6c16
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, disguised as a 'free generator / game hack'. The document body and heuristics indicate a lure for free game currency or hacks, likely intended to lead users to a malicious site. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/how-to-get-free-robux-no-downloading-games-game-hack In PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-coin-master-spins-blogger_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-use-free-models-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-hack-game-download_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-group-gets-hacked_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-proof_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-maze-runner-cheats_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7C 22472 bytes
SHA-256: aca1c63ba11e92765ba9d50c03ce66bbc5ef78025f22258b1f8045e259db05b5
font_01_sfnt_off0000616d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616D 19780 bytes
SHA-256: a9cd89c695cfa72a16a5f47d3aa6203de5df9d8070fa122ad5b09e0cde788867

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