Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a73f9ed3e844179…

MALICIOUS

PDF

44.2 KB Created: 2021-05-19 11:57:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2e50907039c62df00e0f35d49029d187 SHA-1: 6affda779c0261645c6c4f4afb183327715ee1ce SHA-256: 1a73f9ed3e844179cf842b245752ea6a9c3da08ec7c250f2bc279904e7dac9db
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically promoting 'free coin spin coin master game hack'. The document body and embedded links strongly suggest a lure to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.xyz/app/406889139/free-coin-spin-coin-master-game-hack In PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/robuxglobalcom_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/get-free-robux-today_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
stream_003_off00004aaf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AAF 28324 bytes
SHA-256: 73a87fd6ef401ce02a461b3f337df00a9dcf00227dacd45698ab4391c78d9b00
font_01_sfnt_off00008bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC2 17884 bytes
SHA-256: 7cdd316e38b966dc4c029fefa3365f61ff88a2ebb5f677d1a08d60a6ba94bc95

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