Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef8746b23f118e37…

MALICIOUS

PDF

41.7 KB Created: 2021-05-12 22:35:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 916a35a19e5e24bff15a278216da7d60 SHA-1: 3b2790e63b217ddaf72e851310b9cce41b37f4d0 SHA-256: ef8746b23f118e37a53b6c6dfa60d8b6beb9cc473ca59f2dea04175970373ea6
200 Risk Score

Malware Insights

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

This PDF document employs social engineering tactics, presenting itself as a lure for game hacks and free in-game currency to entice users to click malicious links. The document contains multiple embedded URLs pointing to known malicious redirectors and potentially malicious content, suggesting an attempt to deliver a second-stage payload. The heuristic firings indicate a deliberate attempt to trick the user into executing commands or visiting harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/best-free-minecraft-hacked-client-game-hack In PDF document text
    • http://skwolcott.com/images/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://skwolcott.com/images/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://skwolcott.com/images/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://skwolcott.com/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/free-robux-master_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://skwolcott.com/images/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/haktuts-coin-master-free-daily-spins_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_003_off00004889.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4889 25028 bytes
SHA-256: 94c8e077e10594bc4084dbbf90cfe081e0f85d3d5e7b351c0e3e0fa06fc21d1b
font_01_sfnt_off00008135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8135 18200 bytes
SHA-256: dee6b3909f49c7ddbb1ab18ee008f1775ca59041fcbdd753e186a80ce5ffdd4d

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