Malicious PDF — malware analysis report

Static analysis result for SHA-256 23731a5c6827d1e1…

MALICIOUS

PDF

34.5 KB Created: 2021-06-28 10:53:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: eb7923366c8f298a11c5af7467c2b23e SHA-1: edc9e8b648d738787b10a44d2a6b9a40ee6cc9eb SHA-256: 23731a5c6827d1e15b09807a53a687ad96c855555906866a86b7058504bc3f57
160 Risk Score

Malware Insights

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

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body and embedded URLs strongly suggest a social engineering tactic to trick users into visiting potentially harmful sites. While no scripts were extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/yin-vs-yang-roblox-cheat-game-hack In PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/hack-nuevo-para-roblox-2021-btools_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/free-roblox-hacks-with-no-offer_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/how-do-i-get-free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/roblox-free-robux-generator-bc-only_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/hack-roblox-cheat-engine-67_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/bloxblast-com-free-robux_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/how-to-speed-hack-with-bitslicer-on-roblox_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/roblox-free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/free-roblox-game-cloner_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/roblox-hack-unlimited_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/best-free-items-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://mi-alkhairaat.sch.id/__statics/gudangsoal/files/add-robux-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

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_off0000313c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313C 21808 bytes
SHA-256: 5e3d46115d886fcea7312cb09cfe1fb6516b8ee986c78d0825ae2ab76bf93296
font_01_sfnt_off00006144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6144 19172 bytes
SHA-256: 42a6bd186e9af39d7d09291ab908db19381599718c16e2048cef1254b5bccfdf

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