Malicious PDF — malware analysis report

Static analysis result for SHA-256 597ad1d81af803f4…

MALICIOUS

PDF

45.1 KB Created: 2021-06-11 07:52:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8ce466f17c86ca4d5e00cc844da7fed7 SHA-1: df928be8a45999c160f4c22f28856c4a9a9b30a2 SHA-256: 597ad1d81af803f46f19a8f31c60f5413ed19c0445da54f35d0e4d8096181d2d
200 Risk Score

Malware Insights

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

The PDF contains a lure for a 'free Robux giveaway' and impersonates Facebook, directing users to a malicious URL. This indicates a credential phishing or malware delivery attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest exploitation for client execution, likely via a malicious link or embedded content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/free-robux-giveaway-everyone-will-get-robux-proof-game-hack.
  • 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.tw/app/431946152/free-robux-giveaway-everyone-will-get-robux-proof-game-hack In PDF document text
    • http://magnipsor.su/images/the-new-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://magnipsor.su/images/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://magnipsor.su/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/get-gold-coin-master-village-hack_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://magnipsor.su/images/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://magnipsor.su/images/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/robux-hack-descagar_GM431946152.pdfIn PDF document text
    • http://magnipsor.su/images/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://magnipsor.su/images/free-group-generator-for-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_off00005148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5148 24792 bytes
SHA-256: c74c77bd30d648d0afbd2ed0b8b7ccefc666c0b2ed5d2e944de9d339400568e9
font_01_sfnt_off00008a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A74 19352 bytes
SHA-256: 9a500d3b65f6a8379586ae7c3d64301284bfeee0b42cd2178034f652c12432f9

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