Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52d883c9fafaa97…

MALICIOUS

PDF

33.2 KB Created: 2021-07-25 23:23:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c705b8961913d935ea1cb526f881cc01 SHA-1: 1ad60b9b57f7bfafdd74d780387f3aa620cb97aa SHA-256: a52d883c9fafaa97606b5184670bd94c58b3e05267122f807455ffa31e990616
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/classic-minecraft-net-hacks-game-hack PDF link annotation
    • https://verdensbarn.no/images/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://verdensbarn.no/images/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://verdensbarn.no/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://verdensbarn.no/images/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • https://verdensbarn.no/images/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://verdensbarn.no/images/freer-pro-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://verdensbarn.no/images/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://verdensbarn.no/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://verdensbarn.no/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://verdensbarn.no/images/free-robux-generator-com-roblox-hack_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_off0000305f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x305F 22204 bytes
SHA-256: 95cb223943e7be1e9e36f620c0c45ede0446cf81f61819e93ab2f63de9fc5ed8
font_01_sfnt_off0000615f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615F 17812 bytes
SHA-256: 06eb0692cb0ff670c8084f221f19fc536b6b0c4a84b00058b05a05adc7fae17c

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