Malicious PDF — malware analysis report

Static analysis result for SHA-256 57fdb5ee3dd6833e…

MALICIOUS

PDF

35.0 KB Created: 2021-05-30 17:40:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 631815025d93e8f6c56c9264679e4cc8 SHA-1: fc64a4682a66c93096f4c2c21960b4cc58532106 SHA-256: 57fdb5ee3dd6833ed84175b9cdd5f4be1a5ed1a1992fd44b515fce301631f54b
170 Risk Score

Malware Insights

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

The PDF contains embedded links that impersonate Amazon and promise a 'Roblox Hack Me' generator, directing users to a known malicious redirector. This strongly suggests a credential phishing or malware distribution attempt. The presence of PDF-specific heuristics like 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'SE_BRAND_CREDENTIAL_PHISH' reinforces this conclusion.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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.xyz/app/431946152/roblox-hack-me-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.xyz/app/431946152/roblox-hack-me-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002c39.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C39 25540 bytes
SHA-256: b5796099e32a2eb0801cc5bebdc4cdbcc0824e206f86b49136a2e42506b0e25f
font_01_sfnt_off0000674d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x674D 18376 bytes
SHA-256: aef395c884b1121fa113f915db4056a7b0027cd471dc4d96a5cdd03c50f60cf3

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