Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a74561bf4ab2ffc…

MALICIOUS

PDF

34.8 KB Created: 2021-06-21 09:46:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 92bf2942d0574daf16e416a43335f6d5 SHA-1: 73626684fdce28815859f755485eb02edda248b5 SHA-256: 6a74561bf4ab2ffcc78fbe504951fc8750960faddefc944e7d21daf30868b7ff
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, disguised as lures for game hacks and free accounts. The primary malicious URL identified is http://netcdn.co/app/431946152/free-roblox-accounts-with-robux-that-work-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a high likelihood of embedded malicious JavaScript intended to facilitate redirection and potential further payload delivery.

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.co/app/431946152/free-roblox-accounts-with-robux-that-work-2021-game-hack In PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/coun-master_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/oprewards-com-login_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/google-how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/roblox-speed-simulator-2-hack_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/how-to-hack-coin-master-ios-no-jailbreak_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_off00002f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F75 22068 bytes
SHA-256: 468b3f9e4619eac459c457c00c198f53631d5910a9eb24d1956ecc5ea3d12f46
font_01_sfnt_off00006026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6026 19948 bytes
SHA-256: 25c875579330c816dc270a6cc831986c277f5cf3e4bf50255e97f253356454b0

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