Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c29ef72861d50a4…

MALICIOUS

PDF

47.2 KB Created: 2021-05-17 07:39:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 75b898494fc058c83fe58cb767865c56 SHA-1: 39e9363abdc4a9de02762a660eb34a08d00bfdf8 SHA-256: 1c29ef72861d50a4a3417a21001ba67acc571a87760fd91db39d3f6b1a5fb492
100 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically targeting users with lures related to game cheats and currency. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to deliver a malicious payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 3

  • 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/431946152/roblox36.com-free-robux-game-hack In PDF document text
    • http://apcupschennai.com/images/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://apcupschennai.com/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://apcupschennai.com/images/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/more-robux_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://apcupschennai.com/images/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • http://apcupschennai.com/images/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://apcupschennai.com/images/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://apcupschennai.com/images/how-to-get-free-robux-no-human-verification_GM431946152.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_off000049ae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49AE 28056 bytes
SHA-256: 925fea12bf7a7e2fbb2b998fb8c78ea8dbcdea6dcfc6235b5e12f23f18b7c4ee
font_01_sfnt_off00008a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A85 2984 bytes
SHA-256: 889cfc2fd0afa9ea114d6666204c6ce0548d0aae2cba345827d317498c4c06bc
font_02_sfnt_off000094b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94B1 18756 bytes
SHA-256: 75a7293df35b739ae2294dba45007dab7b7658b4df7c6a7e046c10781a1fd260

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