Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c279ff78364d0cc…

MALICIOUS

PDF

34.5 KB Created: 2021-07-08 07:37:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 3900594f7f1de022e8adbc17181591bc SHA-1: 2ff007dd380d08a325033bec1ee06115969acdd2 SHA-256: 4c279ff78364d0cc4005912416e3ae54d41b558c214de33a1d5c3485b0639f39
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 0.9980

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/431946152/free-robux-by-watching-ads-game-hack PDF link annotation
    • http://www.valenciamaids.com/userfiles/files/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-comroblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-robux-on-macbook-pro_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-roblox-clothes-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-ios-gods-hack_GM406889139.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_off00002f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6E 21944 bytes
SHA-256: f6ecfa6f366c60efd2c13257af77f291cfbbfda3a26343ab05d243d92d26348d
font_01_sfnt_off0000600c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600C 19660 bytes
SHA-256: f0cdf6166c464805662a9cde01402bcc449eb6222422d9d5af766ad530424c87

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