Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0368d5f58628b04…

MALICIOUS

PDF

33.2 KB Created: 2021-07-20 08:50:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aac26cd17af777b50ed97794cf2d419c SHA-1: 5eecb1cb0a8a9ce1de93a7d31d87d603d72e3328 SHA-256: a0368d5f58628b0457d159e5f75a8ffb3ffb5291011da37b85df9a8337dc538d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary link identified is http://netcdn.tw/app/431946152/how-to-get-free-robux-without-human-verification-game-hack. This suggests a phishing or scam attempt designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of malicious redirectors and the lure content strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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-get-free-robux-without-human-verification-game-hack In PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mtsn1siak.com/__statics/gudangsoal/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://www.mtsn1siak.com/__statics/gudangsoal/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://www.mtsn1siak.com/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.mtsn1siak.com/__statics/gudangsoal/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/minecraft-apk-download-v1-144-2-free_GM479516143.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
font_00_sfnt_off00002a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A70 22288 bytes
SHA-256: dd4958a1d62d70dd07688157e9becaece4e70ea9994d6f2aeafd68733d89e85a
font_01_sfnt_off00005bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDC 19576 bytes
SHA-256: d6c196fa7de21508bf6b3e678e512c9fb9da877bdd87245515b69efbbf320e55

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