Malicious PDF — malware analysis report

Static analysis result for SHA-256 585b895723cee730…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 04:46:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6b4dfa6ba55afb5039e8097196903383 SHA-1: 4b3dd76e80f4c30b8cac360e44f0693c25c65e55 SHA-256: 585b895723cee730cc8dba97283f497ac2ecd0fd339baac7bb44a2270b0daaec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting a "robux earner game hack". The ML classifier strongly flagged this PDF as malicious. The presence of multiple redirector links indicates an attempt to lead the user to a potentially harmful site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/robux-earner-game-hack In PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/krnl-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/pokemon-go-free-pokeballs_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-without-verification-2021_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_off00004fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FA6 25088 bytes
SHA-256: 09d9c1ac4a5665ca71fb5a2f53a6bc5f9ba51e25f97ebadbf1295d73f3f3e8b3
font_01_sfnt_off000089f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F4 18076 bytes
SHA-256: f5a75b1f1fd7f518e5c7427b096eb9f92d711688fa0aea541fd532851a6f5025

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