Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc58244e39b504b…

MALICIOUS

PDF

34.6 KB Created: 2021-06-27 21:31:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2da175d2655e9da35b0519a044d3a45b SHA-1: c8a1688df39b696494a56a7b9f4b7d10d58d9e6e SHA-256: 5bc58244e39b504beffb4334015e83d49468edd321f238318d17ca3645a19d41
82 Risk Score

Malware Insights

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

The document presents itself as a lure for game hacks and cheats, specifically mentioning Roblox and Coin Master, and contains multiple embedded URLs pointing to potential download sites. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests that the document may be part of a multi-stage attack where the actual payload is encrypted, further increasing the likelihood of malicious intent. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.co/app/431946152/emoji-puppy-tshit-roblox-free-game-hack PDF link annotation
    • http://library.umuslim.ac.id//repository/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-free-hair-catalog_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/dragon-adventures-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-earn-free-robux-no-password-no-email-address_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/hacker-vs-noob-vs-pro-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-god-mod-hack_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-a-free-group-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/banning-hacks-for-khols-admin-house-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/roblox-rape_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-code-carte-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/robux-free-com_GM431946152.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
font_00_sfnt_off00002e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E4A 22272 bytes
SHA-256: 5f721f546d4d31d73a5e50569be7cf8ddab25e4d1778b2f6303cfca887f2cce4
font_01_sfnt_off00005f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F59 20136 bytes
SHA-256: 08565318d142e444c407c473963a983e5a2226096e0d176f9f82c33dc4f50d01

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