Malicious PDF — malware analysis report

Static analysis result for SHA-256 c79fef604eadf43d…

MALICIOUS

PDF

51.4 KB Created: 2021-05-16 06:37:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 682578a5c08624313cfdc093b39f4046 SHA-1: 5082c3cb7690b8e1dc258d20d1680f857d3f9773 SHA-256: c79fef604eadf43dc91339575eab43d4e0d9c71cc8942245a56a941f43934dcf
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically targeting users interested in game hacks. The document body, though heavily obfuscated, contains references to 'hacking' and 'download', suggesting a lure to a malicious payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9348

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/how-to-hack-someone In PDF document text
    • http://santeh-40.ru/images/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • http://santeh-40.ru/images/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://santeh-40.ru/images/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://santeh-40.ru/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://santeh-40.ru/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://santeh-40.ru/images/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://santeh-40.ru/images/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • http://santeh-40.ru/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://santeh-40.ru/images/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://santeh-40.ru/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://santeh-40.ru/images/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://santeh-40.ru/images/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://santeh-40.ru/images/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://santeh-40.ru/images/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://santeh-40.ru/images/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://santeh-40.ru/images/coin-master-deals_GM406889139.pdfIn PDF document text
    • http://santeh-40.ru/images/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://santeh-40.ru/images/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://santeh-40.ru/images/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://santeh-40.ru/images/orewards-com-free-robux_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_off00004971.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4971 28664 bytes
SHA-256: 7ee37092c6a43a7f83f5b0454354540c70903e76f829a946fb95447b10a3abf8
font_01_sfnt_off00008c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3D 7420 bytes
SHA-256: 0b188308ab0e7ffce9913d63d697a586f2937cafc51a771db38e3a566cd37e24
font_02_sfnt_off0000a4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4AD 18912 bytes
SHA-256: 995056b981027bfba3f97be2499ebace8b386febdb07856c531761fbe005e83e