Malicious PDF — malware analysis report

Static analysis result for SHA-256 793dac2a702fdb1e…

MALICIOUS

PDF

35.0 KB Created: 2021-06-18 17:09:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ad162b7db1381f7e86ae46bcde4e2b2b SHA-1: 4e640387be7e43661c598baadaea93ad0694c0bf SHA-256: 793dac2a702fdb1e86933dc01d7dc576c9b42c89cb6e2d4d34f2dcf5de03585c
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free in-game currency. The primary redirector URL is http://netcdn.co/app/431946152/how-to-get-your-hacked-roblox-account-back-2021-game-hack, which likely serves as a gateway to further malicious content or phishing pages. The document's structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting compromised sites.

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-your-hacked-roblox-account-back-2021-game-hack In PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-free-school_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/escape-school-oby-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-base-wars-free-admin_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/robux-hack-no-verification_GM431946152.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_off000031db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31DB 21584 bytes
SHA-256: f725b0395ac65967d0c9ef18936f5b9e59f8c02bac1d03ed6ff640437d181ca9
font_01_sfnt_off0000611c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611C 19804 bytes
SHA-256: 7fbd21036976191941ecdbcac1a0642609ff3095eeb91b1f7843fe0172cd4bd4

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