Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d810ba39bab1e8c…

MALICIOUS

PDF

48.1 KB Created: 2021-05-16 21:07:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1f06e19bf9eda8b37ba0d0a81368e250 SHA-1: 50d587b08d416206d0e1de8cbe6cf2ad5d348475 SHA-256: 1d810ba39bab1e8c24ef5da60883830a03b4e4bec668fe0ee7d09de194f87e3d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent lure for 'free Robux' and game hacks, indicating a social engineering attack. The heuristic firings confirm the presence of external URIs and a game hack redirector lure. While no scripts were explicitly extracted, the document body and embedded URLs suggest a phishing or scam attempt, likely leading to a malicious download or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/get-free-robux-no-human-verification-game-hack PDF link annotation
    • http://medinup.pt/images/link-coin-master_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-minecraft-survival-server_GM479516143.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_off00004a63.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A63 29600 bytes
SHA-256: 46504b5ec018d248739e8e7d836251f64fe9d3295e2b02bdcd6bc9e5678bba29
font_01_sfnt_off00008df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF4 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000097de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97DE 18860 bytes
SHA-256: 77094cb8e4b41d81131149df95963a95cd1356d500cc75fcdf894a2f9afc6be7

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