Malicious PDF — malware analysis report

Static analysis result for SHA-256 557e7758a7e5c6e8…

MALICIOUS

PDF

43.9 KB Created: 2021-05-12 19:04:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 76ee332af6b6c4154f2f8cbf537c9be0 SHA-1: ebb2e47616f4893341715f27eeec2fc7b8a4d7f9 SHA-256: 557e7758a7e5c6e8aa3be2ec5c25314ec467315e6fbf6eb7d4cfca72da886a26
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure related to free game currency and accounts, as indicated by the document body and high-severity heuristics. It contains numerous embedded URLs pointing to external sites that are likely part of a scam or phishing operation. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document's structure and embedded links suggest it is designed to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/431946152/free-roblox-accounts-with-robux-that-work-not-banned-2021-game-hack PDF link annotation
    • http://iedarelief.us/images/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/free-robux-android_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://iedarelief.us/images/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/get-robux-now_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://iedarelief.us/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://iedarelief.us/images/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/coin-master-free-spins-youthnow_GM406889139.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
stream_003_off000048f3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F3 25864 bytes
SHA-256: 7eec392bf70083d2ba29257416dfe9e09f062395840ad862cb2e9f9a87abec1a
font_01_sfnt_off0000852e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x852E 19652 bytes
SHA-256: 72c791ad1c4340ed85ac0ecdba514e35635851f3f818d4a167a4eafc97bf1d2a

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