Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9229438b7b5b08…

MALICIOUS

PDF

43.6 KB Created: 2021-05-21 01:04:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e4dc7ce8c6eb21f88779f6351915e527 SHA-1: 465d3d8ea8e7c7d6347b5fbb84394c076ad0b965 SHA-256: 5a9229438b7b5b08789a1449bbe5fa923b0646861b4a72ee4d572ccea3cd2648
122 Risk Score

Malware Insights

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

The PDF document contains a lure for 'free Roblox hair codes' and presents a fake CAPTCHA to trick users into clicking a malicious link. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-roblox-hair-codes-game-hack, which is likely a redirector to a phishing or malware distribution site. The document's structure and embedded links suggest an attempt to deliver a second-stage payload or lead the user to a fraudulent website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7281

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.xyz/app/431946152/free-roblox-hair-codes-game-hack PDF link annotation
    • https://3qblocks.com.tw/image/data/files/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/why-is-tiktok-free_GM835599320.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-spin-link-coin-master-today_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000034ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34CA 32464 bytes
SHA-256: 6d31f6fc49b82b121f20cf10fcabb07ee06a1b7695e9498b1dad7ff633634e25
font_01_sfnt_off00007b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B91 4080 bytes
SHA-256: 59a648758be49e9ecd29c6604606141ed6b1ec3c1d5d71d723e813a6c2b15921
font_02_sfnt_off000088ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88ED 18472 bytes
SHA-256: 58bd8e37bff2e40e3b0dd1e4e28472cf67d664de325b47398c2f4df4c0a3a645

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