Malicious PDF — malware analysis report

Static analysis result for SHA-256 1087e0d4e0e10d1c…

MALICIOUS

PDF

41.3 KB Created: 2021-05-19 13:01:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0fbc61f8671b66240880d133635775ab SHA-1: d261563862b7bf8e1a580c3a29de12984a36b984 SHA-256: 1087e0d4e0e10d1c029cfa5b741378ddb1ac1911f66bfdf0e56b1e1c44deb491
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and embeds a link to a known malicious redirector. The document body and heuristics indicate a social engineering attempt to direct users to malicious infrastructure. While no scripts were explicitly extracted, the PDF format itself can execute JavaScript, and the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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-i-get-free-robux-on-roblox-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_off00003160.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3160 27236 bytes
SHA-256: 72f7171b5b2389930932d8df07a507747a89fe7d29039d7810506ec319ee9f68
font_01_sfnt_off00007216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7216 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00007f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F28 18524 bytes
SHA-256: 4ccd670e6a0bad46446eeab730d71d218c542e1f5d690955267ad9a8693a3722

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