Malicious PDF — malware analysis report

Static analysis result for SHA-256 0888b3263984964b…

MALICIOUS

PDF

36.3 KB Created: 2021-07-06 19:37:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c50fb530c631ec43c9bf4b999be3fc3a SHA-1: adce97effc0a32dce64c74210ce52179f919ea0f SHA-256: 0888b3263984964b2ffaaf12a80cdcc29d241f6d36ff6f49865693641fc39cf4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs and references to game hacks and free spins, indicating a social engineering lure. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document may attempt to execute commands, likely to download and run a second-stage payload from one of the provided URLs. The ML classifier strongly flags this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 http://netcdn.tw/app/406889139/free-spin-coin-master-link-2021-game-hack
    • https://morishita-tc.com.tw/image/data/files/roblox-dominus-free_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-pc-download_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/roblox-avatar-tester_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/hack-roblox-with-cmd_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/april-fools-hack-of-2021-roblox-wiki_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-latest-version-hack_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-gold-cards-free_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/free-minecraft-skins-ps4_GM479516143.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-shield_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/how-to-hack-roblox-to-get-robux-2021_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/roblox-cheat-engine-table_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-2021-spin-link_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/roblox-hack-ninja-simulator-hacked_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/funbloxxyz-free-robux_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/give-me-robux-now_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/como-hackear-una-cuenta-de-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000036aa.bin
55ba730bece09b5e8e09dab009f45de3f37f94860932b8fb329bbdc41f620a37
pdf-font-stream PDF embedded font (sfnt) at offset 0x36AA 22892 bytes
font_01_sfnt_off000069fc.bin
21e227a5b4a4e86201c5ffd53a68098e06ad4a81ecbeade678e9824eb4386a01
pdf-font-stream PDF embedded font (sfnt) at offset 0x69FC 18748 bytes