Malicious PDF — malware analysis report

Static analysis result for SHA-256 b73c0a48e3987e58…

MALICIOUS

PDF

40.2 KB Created: 2021-05-22 07:23:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 30e6e1c6bc531c256b91571797b64a89 SHA-1: a4fb82bf7493042e4cb19d0c0f03d4c470e379bb SHA-256: b73c0a48e3987e58800bdce5e282144739c49438a2888a7304e875c66ba26e21
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure related to free game hacks and generators, containing multiple embedded URLs that redirect to malicious infrastructure. The document body explicitly mentions 'How Do U Get Free Robux 2021' and includes a call to action to access a generator, strongly suggesting a phishing or scam attempt. The embedded URLs are designed to lead users to further malicious content or potentially download additional malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7829

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 https://netcdn.xyz/app/431946152/how-do-u-get-free-robux-2021-game-hack In PDF document text
    • https://ceiprevellodetoro.org/images/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/moon-active_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_off000033d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33D2 24680 bytes
SHA-256: d2bafd81c2f6499750eb772371eb0aa3dc9e5b97020b2fdf3d117dfbcd10dd81
font_01_sfnt_off00006c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C95 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000793c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x793C 19040 bytes
SHA-256: 14ed63897d8c38c9b74f4ae6c685ddc963b8153977262fdb6411d06658c720a7

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