Malicious PDF — malware analysis report

Static analysis result for SHA-256 e33dc5e9c93ecf92…

MALICIOUS

PDF

37.6 KB Created: 2021-05-21 02:54:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8a5d8edeedf522686e4cb73e29a42194 SHA-1: c81e3fca9e3e0d4ffb981db7f7269cb5a31c688c SHA-256: e33dc5e9c93ecf9209a8f8b5c1aa1e9b6fd1bfb38a0b326d49ed5a969f4fe63d
160 Risk Score

Malware Insights

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

The PDF contains multiple links, one of which, 'https://netcdn.xyz/app/431946152/free-roblox-hair-codes-game-hack', is identified as a malicious redirector. The document body and heuristics indicate a lure for game-related cheats or generators, a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest potential for client-side exploitation or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/free-roblox-hair-codes-game-hack In PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/minecraft-logo-maker-free_GM479516143.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
stream_002_off00003376.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3376 26368 bytes
SHA-256: b59473733ee17b708a229cd970f259db4bf4f9dd1acf58fe8d407e0c3a7733b6
font_01_sfnt_off0000714e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x714E 18472 bytes
SHA-256: 58bd8e37bff2e40e3b0dd1e4e28472cf67d664de325b47398c2f4df4c0a3a645

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