Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd8dcfcd9cb18c0…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 23:48:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 80e8d7572a96810252914a5c47aa8e2c SHA-1: 78a32de00b90cc6e2f1106199b1200f980bef8b2 SHA-256: 2dd8dcfcd9cb18c0d94fc3e21c2091a39b5608426e3840981e67f8d7f3596641
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The document body, though partially obfuscated, contains similar lures and URLs. The primary attack pattern involves social engineering to trick users into visiting these malicious sites, likely leading to further malware downloads or phishing attempts. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/coin-master-hack-tool-generator-game-hack In PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/roblox-free-printables_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/wurst-112_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/rewards-robux_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/60-free-spins-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
stream_004_off000050b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50B7 25504 bytes
SHA-256: b59b6df6fe20aad3004b9ff6ccbe6da2258484d9790f767485be6adf4d89c622
font_01_sfnt_off00008bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDB 17788 bytes
SHA-256: 0f526e1abc45333298d61d2ffbd228c521fd862e0b4d0d4d8e01ed873be913f0

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