Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b755903c5332fd…

MALICIOUS

PDF

41.3 KB Created: 2021-05-13 03:32:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 63d09e5f1a9755d10d27a3d3882a7230 SHA-1: 43ac0ca054e43c0b3bb2d3197bcfa080834af8e7 SHA-256: 70b755903c5332fdd51cda56af6ada525e5ded4b3e0dadd7b05865602654b7af
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 0.9971

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.xyz/app/479516143/how-to-get-minecraft-for-free-on-iphone-game-hack PDF link annotation
    • http://inextpresident.com/images/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • http://inextpresident.com/images/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-home_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/free-robux-websites-that-actually-work_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_off000048fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48FB 24124 bytes
SHA-256: 7371f170a6d7b6950f5a27f91a790ef889113a47f11fc221d3b6f18388e9f60b
font_01_sfnt_off00007f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4E 18216 bytes
SHA-256: bed6c76176a434f358ebc88a31d2dbe88cb1547cd8758d4c9ade2f80066016aa

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