Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0faf3932ee80f37…

MALICIOUS

PDF

47.0 KB Created: 2021-05-13 11:47:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6787d4ef2869e3ad114647da60102d99 SHA-1: 527d1053f8bece46ab290b4751346ada3575a38b SHA-256: b0faf3932ee80f37e6d9005206326a90a4d2e68e922e4a950b59398ea2893e8c
62 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a heuristic firing for external URIs, all pointing to sites offering game-related cheats or currency. The document body, though partially corrupted, contains text related to 'Robux' and 'game hack', reinforcing the lure. The presence of a download button lure and callback phishing lure suggests a social engineering approach to trick users into downloading potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/i-need-robux-game-hack PDF link annotation
    • http://huounaixunghe.com/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://huounaixunghe.com/images/mcpe-download_GM479516143.pdfIn PDF document text
    • http://huounaixunghe.com/images/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://huounaixunghe.com/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://huounaixunghe.com/images/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://huounaixunghe.com/images/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://huounaixunghe.com/images/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://huounaixunghe.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://huounaixunghe.com/images/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • http://huounaixunghe.com/images/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://huounaixunghe.com/images/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://huounaixunghe.com/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://huounaixunghe.com/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://huounaixunghe.com/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/free-roblox-card_GM431946152.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_off00004ae4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AE4 26664 bytes
SHA-256: 3629863c31442ffca62a70d727d1c42903895d1f2a8d6a52a316d6dfc7c80b1c
font_01_sfnt_off000088ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88AE 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000095bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95BF 18024 bytes
SHA-256: f1ec7b04fe7efc10da220c54b18b8286c95b0450e2bf9e35db279b0a74518d0c

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