Malicious PDF — malware analysis report

Static analysis result for SHA-256 c142995c86bb1bf3…

MALICIOUS

PDF

45.2 KB Created: 2021-05-11 17:39:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9d78264c7a5c391b5e2811b5b35b507b SHA-1: 1c0c4622f0b234b18d75f01e41d5d1643b88cdd9 SHA-256: c142995c86bb1bf302a036804f24681cdb6c8fb80bc38b90a836225575cce034
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs and a visual download button lure, suggesting an attempt to trick users into downloading further content. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of external URIs and the overall suspicious nature of the content indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

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/479516143/how-to-get-free-skins-in-minecraft-game-hack In PDF document text
    • http://technologicalsc.com/images/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/free-100-robux_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/oprewards-login_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/xray-hack_GM479516143.pdfIn PDF document text
    • http://technologicalsc.com/images/free-spins-coinmaster_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://technologicalsc.com/images/get-robux-com_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/mine-minecraft-games-for-free_GM479516143.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_003_off00004aba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ABA 25972 bytes
SHA-256: bf3c2164d21c5ffa20897ccaad06d0883826223bacd128401a65e05ebc5029d6
font_01_sfnt_off00008573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8573 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off00008f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F13 18044 bytes
SHA-256: 6cc59c28d5557832b1af72f7b0f143d8adff3a85e9aacd177c0586c4e7a11f45

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