Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c92538bee1c0165…

MALICIOUS

PDF

44.6 KB Created: 2021-05-19 12:33:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 60d7f1f9165f5ff9716b1396e6045f78 SHA-1: ad2882a5894955ac625288ea7211664e6c5c0445 SHA-256: 5c92538bee1c016536801fd23d2170b26f6dcd57611bef2952e4d5118ca4687e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for game hacks and free currency, directing users to a malicious redirector URL. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt. The primary malicious URL identified is https://netcdn.xyz/app/1330123889/pubg-uc-uae-game-hack.

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 https://netcdn.xyz/app/1330123889/pubg-uc-uae-game-hack In PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-village-3_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-free-robux-on-phone_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
stream_003_off00004378.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4378 31504 bytes
SHA-256: 719b6f0c26a537aae4daf60d3cf7ff046fb2abca9298f3286eed6e2f36a5e3ef
font_01_sfnt_off00008cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBD 18124 bytes
SHA-256: 4d3ca95941215263ac1f379669c58e588ead32d6672b5a5328bffaec15aef73f

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