Malicious PDF — malware analysis report

Static analysis result for SHA-256 797f554a6628fbbb…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 07:34:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 268c21733cb6070c8e48b8c2ce9e2d21 SHA-1: 09983dad80d9dfa35e10df8663b0aba09234c4ce SHA-256: 797f554a6628fbbb7f7bc63dfe906610f25ef9bd7db3715a905277b7a616415a
160 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'free generator / game hack' and links to a known malicious redirector. The ML classifier also flagged this PDF as malicious. The embedded URL, http://netcdn.co/app/406889139/free-coins-coin-master-game-hack, is the primary indicator of malicious intent, likely leading to a further exploit or malware download.

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/406889139/free-coins-coin-master-game-hack In PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/is-roblox-free-on-ipad_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/veil-free-download-roblox-exploit_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-noob-skin-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/download-cheat-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-robux-hack-generator-xbox-one_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-vip-server-for-roblox-labyrinth_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-frog-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-robux-codes-redeem_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/how-to-hack-in-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-knife-ability-test-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/how-to-get-free-pets-in-roblox-pet-simulator_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/hacks-de-chat-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/how-to-hack-roblox-accounts-2021-mobile_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-robux-giveaway-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/booga-booga-roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/ar-hack-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-download-for-windows-7-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/how-to-hack-hero-academy-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/how-to-get-free-robux-on-roblox_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_off000032d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D7 23144 bytes
SHA-256: 2583a1a7dcd99f2612ae12a7db3829c26bda997990ef82f49210bb72fd41e15f
font_01_sfnt_off000066e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E7 17996 bytes
SHA-256: db592684bbdaaeb7647633841870edbd5981f70e843d3403859f62ceb8e0c83d

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