Malicious PDF — malware analysis report

Static analysis result for SHA-256 929ff3d63a2cda3f…

MALICIOUS

PDF

33.1 KB Created: 2021-07-03 16:23:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d4a3eed38d2df4d8022ddf54c037b875 SHA-1: ea6323fbc721f78a5bf56c1fe612004f09dacea0 SHA-256: 929ff3d63a2cda3f98a0c3b93a99f500fb3420db6799bc40c0159ca83f5ec153
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game items, directing users to a URL associated with malicious redirector infrastructure. The document body and heuristics indicate a phishing attempt to trick users into visiting potentially harmful sites. No scripts were extracted from this sample, but the embedded URL is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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 http://netcdn.tw/app/431946152/free-robux-without-offers-game-hack In PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/roblox-robot-animation-pack-free_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/hack-with-script-roblox_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-20-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-get-free-robux-funky_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-do-you-get-free-coins-in-coin-master_GM406889139.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_off00002c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C73 21548 bytes
SHA-256: 97e88a1d9af5494920ddf2053c328d612766627733f5fc8deff9245db9deb996
font_01_sfnt_off00005b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B97 19304 bytes
SHA-256: d28279064c80375efd82c55b38a8139998c8ec291e9a82c1a232f0005e70f64e

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