Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb884707d4df2526…

MALICIOUS

PDF

42.1 KB Created: 2021-05-14 23:56:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 31be2d23d8e06323f7280758a3554c99 SHA-1: 217890498b1325a627f89bc8f4649e6ecb13fa82 SHA-256: bb884707d4df252691deae6046f8123f0822394914d7c078ad75bc5a29210422
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to deliver a malicious payload or redirect to a phishing site. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains URLs related to 'free Robux' and 'Coin Master spins', suggesting a lure for game-related scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/robuxmatch.con-game-hack In PDF document text
    • https://www.les-sp.org/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/play-games-for-robux_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • https://www.les-sp.org/images/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/lots-of-robux_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • https://www.les-sp.org/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/roblox-free-robux-generator_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_off00004739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4739 25316 bytes
SHA-256: 94c90e0a7b1c0e1c3fafc10b2f62b035055b814f415a8f63832680dbdc5bf168
font_01_sfnt_off00008117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8117 18672 bytes
SHA-256: b3ad435d94df059fa4f5f4039152be4ff635e0c8c599297d8dd6c4123da1a60e