Malicious PDF — malware analysis report

Static analysis result for SHA-256 99dd178936be50bf…

MALICIOUS

PDF

41.8 KB Created: 2021-05-14 22:10:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4c144c087ee117dcf0f86cdb9593a503 SHA-1: 3e762e1a69aa24ac4df886aabe33179727c75e11 SHA-256: 99dd178936be50bf690b8d97f072d6767b71cb9537576b31ad05c51252aca489
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and virtual currency to entice users. It contains a large number of embedded URLs, forming a link farm that likely directs users to malicious sites or further downloads. The ML classifier strongly indicated maliciousness, and the presence of a "recovery secret / private key request" heuristic suggests a phishing or credential harvesting attempt.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/406889139/real-coin-master-hack-game-hack PDF link annotation
    • https://scraperite.com/images/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • https://scraperite.com/images/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • https://scraperite.com/images/robux-now_GM431946152.pdfIn PDF document text
    • https://scraperite.com/images/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://scraperite.com/images/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • https://scraperite.com/images/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
    • https://scraperite.com/images/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • https://scraperite.com/images/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://scraperite.com/images/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • https://scraperite.com/images/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • https://scraperite.com/images/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • https://scraperite.com/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://scraperite.com/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://scraperite.com/images/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://scraperite.com/images/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://scraperite.com/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://scraperite.com/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://scraperite.com/images/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • https://scraperite.com/images/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://scraperite.com/images/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000495e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x495E 25012 bytes
SHA-256: 7650f1d5256f582afe19776969a15395487ec7b5c1ac75916e6bd9207bc704a6
font_01_sfnt_off00008268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8268 17788 bytes
SHA-256: c971b34c329d205054a16b1b5f827a74783bca0f841d374511d085dfea161b8f

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