Malicious PDF — malware analysis report

Static analysis result for SHA-256 313b455868352dfe…

MALICIOUS

PDF

47.3 KB Created: 2021-05-19 21:05:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8e53815d916f6f24340a642ef827f068 SHA-1: 7d1ac2a10176a7fcff1c74eb3480d1d4987200d0 SHA-256: 313b455868352dfe52e2ff1194eaa47b566faf65fb1a46547254e68249d8058e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'Free Robux Redeem Codes 2021' and an embedded URL pointing to a suspicious domain. The ML classifier flagged this PDF as malicious, and the presence of a download button lure and payment redirection lure heuristics further indicate a malicious intent. The document body, though partially corrupted, contains the primary URL used in the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 4

  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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-robux-redeem-codes-2021-game-hack
    • https://ezgolfer.com.tw/image/data/files/minecraft-for-free-games_GM479516143.pdf
    • https://ezgolfer.com.tw/image/data/files/coin-mast-hacks_GM406889139.pdf
    • https://ezgolfer.com.tw/image/data/files/coin-master-spin-link_GM406889139.pdf
    • https://ezgolfer.com.tw/image/data/files/free-coins-coin-master-iphone_GM406889139.pdf
    • https://ezgolfer.com.tw/image/data/files/how-to-get-free-roblox-premium_GM431946152.pdf
    • https://ezgolfer.com.tw/image/data/files/how-to-download-minecraft-for-free-on-windows_GM479516143.pdf
    • https://ezgolfer.com.tw/image/data/files/how-to-make-roblox-clothes-for-free_GM431946152.pdf
    • https://ezgolfer.com.tw/image/data/files/get-free-robux-without-human-verification_GM431946152.pdf
    • https://ezgolfer.com.tw/image/data/files/pokemon-go-free-walk-hack_GM1094591345.pdf
    • https://ezgolfer.com.tw/image/data/files/master-coin-free-link_GM406889139.pdf
    • https://ezgolfer.com.tw/image/data/files/free-roblox-accounts-dantdm_GM431946152.pdf
    • https://ezgolfer.com.tw/image/data/files/free-roblox-account-generator_GM431946152.pdf
    • https://ezgolfer.com.tw/image/data/files/how-can-i-get-robux_GM431946152.pdf
    • https://ezgolfer.com.tw/image/data/files/how-to-get-free-hair-on-roblox-2021_GM431946152.pdf
    • https://ezgolfer.com.tw/image/data/files/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdf
    • https://ezgolfer.com.tw/image/data/files/coin-master-cheats-2021_GM406889139.pdf
    • https://ezgolfer.com.tw/image/data/files/coin-master-hack-injection_GM406889139.pdf
    • https://ezgolfer.com.tw/image/data/files/lazy-blocks-com-free-robux_GM431946152.pdf
    • https://ezgolfer.com.tw/image/data/files/monttechscom-coin-master-free-spins_GM406889139.pdf
    • https://ezgolfer.com.tw/image/data/files/coin-master-free-cards-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c3a.bin
ec86b1e1d9ebf5997fcc4a38788d6664f3923afa04722d694faf887b68293b7b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C3A 24504 bytes
font_01_sfnt_off000084ab.bin
62075f0fe13502d46afb6e55e83d440c29ef4988399537df1f86e7653ce3b744		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84AB 6636 bytes
font_02_sfnt_off000094b8.bin
835008e062f354a08c5cd285c30dce0b291468b55589a8f36d5d300bab70ed7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94B8 18852 bytes

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