Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d3907e9110049d7…

MALICIOUS

PDF

41.9 KB Created: 2021-05-18 00:11:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2669ba6428988d09e3a4c17496b6cebb SHA-1: 4dce3a3a45acd024981d2f8afe5b3efed19fc2a6 SHA-256: 5d3907e9110049d737064cc99d7efd82e08430b036aa060f5e9b59243b908714
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to websites that are flagged as malicious redirectors, specifically promoting 'game hacks' and 'free currency'. The ML classifier also strongly indicated maliciousness. These links likely lead to further malicious content, such as phishing pages or malware downloads, serving as a lure to trick users into clicking.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-hack-2021-no-human-verification-game-hack In PDF document text
    • https://photographygroupofbunbury.com/images/www-rubux_GM431946152.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/robuxglobalcom_GM431946152.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/coin-master-level-4_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/roblox-person_GM431946152.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/how-to-generate-free-coin-master-spin_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_off00004a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A79 24048 bytes
SHA-256: 355d7c685e6eac8387a56eafd698edbb8fbec57282020f81a1efa147a013ca86
font_01_sfnt_off0000804e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x804E 18652 bytes
SHA-256: b8f105c40d85849bb980b8b1f3fc80cc73964bf3899fc8976168334accd52214

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