Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a1065745c9969d…

MALICIOUS

PDF

48.7 KB Created: 2021-05-16 03:10:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5251179ebb204940daa50a4f80cfe39b SHA-1: ca011a24cab0505289584dd523e2bb75cc28eaf2 SHA-256: 61a1065745c9969d4dfb6a6c27202f8b9d79f01dfeec8580fa04dbf7767dbb96
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external PDF files, presented as a link farm for game hacks and free Robux. The ML classifier strongly indicated maliciousness, and the presence of external links suggests an attempt to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains URLs that align with the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/can-you-actually-get-free-robux-game-hack PDF link annotation
    • http://taris-film.de/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://taris-film.de/images/coin-master-hack-software-download_GM406889139.pdfIn PDF document text
    • http://taris-film.de/images/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • http://taris-film.de/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://taris-film.de/images/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://taris-film.de/images/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://taris-film.de/images/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://taris-film.de/images/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • http://taris-film.de/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://taris-film.de/images/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://taris-film.de/images/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://taris-film.de/images/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://taris-film.de/images/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://taris-film.de/images/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • http://taris-film.de/images/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://taris-film.de/images/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • http://taris-film.de/images/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://taris-film.de/images/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://taris-film.de/images/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://taris-film.de/images/how-to-hack-roblox-for-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_off00004b83.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B83 28852 bytes
SHA-256: 7eab68f0f365e221c2d685894d5a7d06f5053a39bc87f6c57ea36d5e4e5b603b
font_01_sfnt_off00008d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D69 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7B 18764 bytes
SHA-256: 47da03a4981b0a54a8018003304e59ec7e3f87382350c48cbaac3b3d81608ccf