Malicious PDF — malware analysis report

Static analysis result for SHA-256 56d3515ecf6ef70a…

MALICIOUS

PDF

46.6 KB Created: 2021-05-15 01:10:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7c15d6ed058918b8affc290138c7a877 SHA-1: 31778502d6de6a332b11184ac155735950ed9899 SHA-256: 56d3515ecf6ef70ab8cf058e6bfe3a842a5a1b0436c0932af1dbe3e509e11f5f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and game-related lures, such as 'free generator / game hack'. The document body, though partially obfuscated, also contains URLs pointing to potentially malicious PDF files. The primary function appears to be redirecting users to external sites, likely for further malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-bloxburg-free-money-game-hack In PDF document text
    • http://adravietnam.org/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/free-robux-download_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-attack-block-hack_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/free-promo-codes-for-robux_GM431946152.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
stream_003_off00004717.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4717 27104 bytes
SHA-256: 0e088e79969738fd5db6ff94fba3815758c8e81367fb5e40ddeb5593ea3686d2
font_01_sfnt_off00008540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8540 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9252 18752 bytes
SHA-256: c72edf7f295ea5b6e4c4fbac7fffd7f1014e7fa72a796dfc48705834c0b32895

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