Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdfc78c4fe15cb52…

MALICIOUS

PDF

37.0 KB Created: 2021-05-22 04:06:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 92277dd498d49a85d952dc4e8ad46ff2 SHA-1: 8bc155a70b85b1bf117f1200137539088bedea5b SHA-256: fdfc78c4fe15cb52f086a5ff8c5f5513c1a4cfae3abd576622b53884ebd5c865
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game hacks and generators. The document body and embedded links suggest a social engineering tactic to drive traffic to potentially malicious websites. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious workflow designed to exploit user interest in free in-game items.

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/835599320/free-tiktok-app-game-hack In PDF document text
    • http://elearningku.maliska263.com/__statics/gudangsoal/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningku.maliska263.com/__statics/gudangsoal/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://elearningku.maliska263.com/__statics/gudangsoal/files/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://elearningku.maliska263.com/__statics/gudangsoal/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearningku.maliska263.com/__statics/gudangsoal/files/earn-free-robux-today_GM431946152.pdfIn 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_off00003211.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3211 29052 bytes
SHA-256: aa509e6939bee4e1b2d4e42e3aeb3ad2cde8b9968ee340831e5f4ac13fdf8398
font_01_sfnt_off00007176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7176 17632 bytes
SHA-256: ea608747ff9a73a218f7ff90867c843845867270d7f940ccd5b7614aaec9a371

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