Malicious PDF — malware analysis report

Static analysis result for SHA-256 963f222db00482ca…

MALICIOUS

PDF

44.6 KB Created: 2021-05-14 14:31:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 99c9edc772592f015fcadaa298c40713 SHA-1: dcccabfe28b7660ae5f2558f6ac6a45878164928 SHA-256: 963f222db00482ca04811469ed00e63c7563b77258a097189f647aa68a688ce8
142 Risk Score

Malware Insights

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

The PDF document contains numerous links designed to lure users into clicking on them by promising game hacks and free currency. These links redirect to external sites, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/431946152/roblox-promo-codes-for-free-robux-game-hack PDF link annotation
    • http://jkcoaching.nl/images/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://jkcoaching.nl/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://jkcoaching.nl/images/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://jkcoaching.nl/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://jkcoaching.nl/images/coin-master-free-spins-1701-20_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://jkcoaching.nl/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://jkcoaching.nl/images/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://jkcoaching.nl/images/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://jkcoaching.nl/images/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000489e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x489E 24464 bytes
SHA-256: e314861abe3229227832cbb292b6eb82724173fe2b8dfbcc62e0b3616a54f7c5
font_01_sfnt_off000080c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C1 2892 bytes
SHA-256: c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4
font_02_sfnt_off00008aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAB 18676 bytes
SHA-256: 3ed324e585500d41944ebd93500991c566830021fec9c5a8323b790459c3443f

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