Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa5ecbf0d65990b…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 06:28:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 8476e3055924f3e644ea34a57ebc92d9 SHA-1: f92c9e170f2b16ff0e7bfba8391918db3e549bd7 SHA-256: eaa5ecbf0d65990be69353e570fb5ac890178a4f072046365540b6048e83bcff
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'redeem codes' to lure users. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to a site that likely hosts further malicious content or exploits.

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/479516143/minecraft-java-edition-redeem-code-free-2021-game-hack In PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-hack-android_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/pubg-uc-gift-card_GM1330123889.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-hack-any-roblox-account_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_004_off0000547b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x547B 24208 bytes
SHA-256: 4f16122b60ba22fedafdf238b92951ebcf04f432c75c92a66bb8026ceddbd23a
font_01_sfnt_off00008bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDC 18824 bytes
SHA-256: 3e84327372ede1fb0dd75240746e2dc46639f78069d280fe972667d8e0b4261e

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