Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1636b822b9547f9…

MALICIOUS

PDF

25.7 KB Created: 2021-07-04 08:23:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5a07adbe5376db7e52637222e4e8b96f SHA-1: ab347e6e25b5343ce37a1600ba517143ccf511ac SHA-256: e1636b822b9547f9f773e40b3605d08a594b1cc17f9d71fbcf0056d5ba4d9c05
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically advertising a 'game hack' or 'Robux generator'. The document body, though heavily obfuscated, contains text related to hacking and a call to action. The presence of these links and the lure strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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 http://netcdn.tw/app/431946152/how-to-hack-people-on-roblox-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn extracted file (font_00_sfnt_off000013fb.bin)

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_off000013fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB 20480 bytes
SHA-256: 1eed0654f8c26cbc5bcbc340a1e6130b94f7c42cddcd7b500d56d3c3447b8b40
font_01_sfnt_off00004009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4009 19148 bytes
SHA-256: 0496404f34f461102572dff09184c0b6082fd286070dd383a6badfad3968c72e

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