Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8945273ec92ddef…

MALICIOUS

PDF

40.0 KB Created: 2021-05-22 07:05:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bc81c4dd82e08fb300cf06853b2575c8 SHA-1: e1dc06eb24203a50d3f60fcde6a120ebcaa31473 SHA-256: e8945273ec92ddef800749f04c35d3ed3c785afde029833c0a2174abf83fd792
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, specifically advertising "game hacks" and "free coins" to entice users. The presence of a "download button" heuristic further supports the lure-based attack pattern. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/406889139/coin-master-free-coins-and-spins-game-hack In PDF document text
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/free-robux-com-no-verification_GM431946152.pdfIn 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_002_off00003604.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3604 26408 bytes
SHA-256: 8d63cb7b1661e483cf85f174b95969f22d9082a870564abae9f3786bb613d3b2
font_01_sfnt_off000071c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C9 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB3 18060 bytes
SHA-256: f77ee24e01944806ea28e16fd73427a54f7109e241804df06ce657d8c6d11cfb

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