Malicious PDF — malware analysis report

Static analysis result for SHA-256 91d440ce75d281f2…

MALICIOUS

PDF

33.1 KB Created: 2021-06-28 06:28:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9c8164551ae4c3ff84f7e959fae0ca2b SHA-1: 137d8f29cf436afd5540a45fcc1eb417993cb482 SHA-256: 91d440ce75d281f20d1b932d5fdbf187c70392569528ea57cbdc234a4af36609
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded links, including one to 'netcdn.co' which is flagged as a game hack redirector. The document body and heuristics indicate a lure for free game hacks and cheats, aiming to trick users into visiting malicious URLs. No scripts were extracted from this sample, but the high confidence ML classification and the nature of the embedded links strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/roblox-hacks-cheats-gold-game-hack PDF link annotation
    • http://perpus.wdh.ac.id//repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-cheat-at-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/exploit-roblox-download-free_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/robuxian-free-robux-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/promo-code-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-items-with-inspect-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-inspect-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-cheats-for-escape-super-clowns_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-bunny-ears-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-make-your-game-in-roblox-hack-proof_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/da-hood-pitchfork-hack-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_off00002c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C5E 21688 bytes
SHA-256: 36deebe5c5d55ebdc0a55aeeb634e22110b39f7d49608e425cb57de033492d53
font_01_sfnt_off00005c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C16 19100 bytes
SHA-256: 3cb0106bd2c90608f106834957603eeddb3d4e6c57339b462c378731da24dddb

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