Malicious PDF — malware analysis report

Static analysis result for SHA-256 c479910b0df4c860…

MALICIOUS

PDF

39.9 KB Created: 2021-05-10 11:36:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bafc94918dff01c811c93d686354f731 SHA-1: 1bb65ce7a4d413dca3294b416516590ea131134d SHA-256: c479910b0df4c860d004487f3d84fa936cc265e7e9d677aa0a042626f72eec09
170 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'Roblox Cheat' or 'game hack'. The document body also contains the same lure and URL. Another heuristic indicates a lure for MFA or one-time code harvesting, suggesting credential theft. While no scripts were extracted, the presence of malicious links and lures points to a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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-cheat-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000035e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35E2 25556 bytes
SHA-256: fb4e0e55b85c881c61d916a8d79b6291a38efc76c4d4a490c937149fe0ef0b2f
font_01_sfnt_off00007099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7099 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4B 18280 bytes
SHA-256: 98eeb43752f52f60f387912f8d519d04d2eb9110f2a162fc7878abe7cd109578

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