Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ef388c96f0474f…

MALICIOUS

PDF

46.5 KB Created: 2021-06-09 11:42:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c04c8b8e874837ddaf1694819a9dd463 SHA-1: d2047e3866aeafb89921ebc117621a1586aa2872 SHA-256: 62ef388c96f0474f86c744430cad987d67f4582bc1c7584ab3161484875b1457
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 0.9832

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 https://netcdn.tw/app/431946152/how-to-know-if-someone-is-hacking-on-roblox-game-hack PDF link annotation
    • https://www.astrospace.com.tw/upload/files/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/pokemon-go-free-incense-2021_GM1094591345.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-robux-group_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/lazy-blocks-com-free-robux_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_004_off000054b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54B8 26380 bytes
SHA-256: c4e4c347564c53d71a91b687198abb7e95f6a4560ccb0e6031627f838c3025eb
font_01_sfnt_off0000913c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x913C 19016 bytes
SHA-256: cfc37ff71387914bf5c60404b2fd4f06fe0492cfb3e66b557d835435a69df8e3

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