Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecb737c832e139fb…

MALICIOUS

PDF

35.4 KB Created: 2021-05-25 07:02:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d8ccbeb83584a351c3d9f785cbddb7f7 SHA-1: 5df12e26d8b68ec74011f55419d30bee02776a89 SHA-256: ecb737c832e139fbb5462755613ddd6daab82f4fa2b25a9de9ca5645c88f1a0f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document contains lures related to free in-game items and includes multiple URLs that likely lead to malicious content or further infection vectors. The presence of a 'download button' heuristic and a 'payment redirection lure' suggests a scam or phishing attempt designed to trick users into visiting a compromised site. While no scripts were directly extracted, the PDF structure and embedded URLs indicate a potential for exploitation, possibly via embedded JavaScript or by directing the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/835599320/tiktok-likes-for-free-game-hack
    • http://killebergsridsport.se/images/free-magical-chest-coin-master_GM406889139.pdf
    • http://killebergsridsport.se/images/freespincoin-masterlinkdownload_GM406889139.pdf
    • http://killebergsridsport.se/images/robux-hacks-2021_GM431946152.pdf
    • http://killebergsridsport.se/images/how-to-hack-someones-minecraft-account_GM479516143.pdf
    • http://killebergsridsport.se/images/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003436.bin
8f84f56455bb94685760801e1e9de97891c51705bbba29103537270d1e7a5b72		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3436 24108 bytes
font_01_sfnt_off00006b5b.bin
6bc07a916d4e04dd857b15fc22f6a85a1633f574b63a4730ea8dc15634c660b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5B 17456 bytes

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