Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef2e2c419bcdab93…

MALICIOUS

PDF

43.6 KB Created: 2021-05-12 07:03:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 47547ca903b7fea6f56afcf45128836b SHA-1: 93742aaffad88ea647ce12456f0b7033ea662370 SHA-256: ef2e2c419bcdab93dbabc158712c8635a7844acfd823ee1c068dadc3e535a106
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified as a 'link farm' and a 'game hack redirector' lure, pointing to URLs associated with free game currency and accounts. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the structure and embedded links strongly suggest a phishing or redirection attempt to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-games-com-free-game-hack PDF link annotation
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/robux-money_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/roblox-download_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/minecraft-free-online_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn6-cirebon.sch.id/__statics/gudangsoal/files/free-robux-offers_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_off00004ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AD6 26996 bytes
SHA-256: c0e1f094fe3f1f946397131da28b2c99daec56a8f513827c031118052b181fd0
font_01_sfnt_off000087b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B7 18436 bytes
SHA-256: 12a1ebdc23dbe72020258fb4b08eb8446381ab7182b16aac5facd4bdcef33cb0

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