Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09edacc96c88ad8…

MALICIOUS

PDF

45.2 KB Created: 2021-05-19 00:35:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7a08ecde1a40e715fc088b9a397c8249 SHA-1: 2631d5ef57625dce47d73595895ad2b3038c90d4 SHA-256: a09edacc96c88ad8ba859b40919141f89260f1c951c82d2737da3957e1d8970f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that redirect to sites offering game hacks and free in-game currency, a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it links to known malicious redirectors. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into downloading further malicious content or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/479516143/minecraft-wurst-game-hack In PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/coin-master-homepage_GM406889139.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/tiktok-free-view-30-detik_GM835599320.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/robux-free-co_GM431946152.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://elearningmts.nurulfalahalhuda.com/__statics/gudangsoal/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bb3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB3 25460 bytes
SHA-256: 766488f570fd42edc25ab16b83bf8de4f7d74ba2bc6face649a7c8a5dba2d985
font_01_sfnt_off00008571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8571 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F5C 17904 bytes
SHA-256: 6cf7ff8bcf9245938aca4eb00b48b7f4b489249ade5837454daf8c34eab52db5

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