Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4405e4785a1451b…

MALICIOUS

PDF

55.1 KB Created: 2021-05-13 15:06:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0295acb15f6627a5f7f6d381626fe7e8 SHA-1: ca0e34990ecbd086e07e15d0fe09f6aed13a2ec1 SHA-256: b4405e4785a1451b5c6139a2f46b277059566e52a5f9adeba38ee980d947e0d8
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various scam-related URLs. The document body, though partially corrupted, contains a primary URL that also appears in the heuristics and IOCs. The presence of a ML_NYX_PDF_MALICIOUS firing and the sheer volume of external links suggest a malicious intent to direct users to potentially harmful websites, likely for phishing or scamming purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8531

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/406889139/coin-master-free-daily-spins-link-game-hack PDF link annotation
    • http://schrichte.de/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://schrichte.de/images/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c37.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C37 25484 bytes
SHA-256: 694d86b126d8801b7916ada9b6be75a74f5a6c5c5e7a6752ffa4bfa9e685f641
font_01_sfnt_off00008789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8789 3152 bytes
SHA-256: d8bc7cd69a69a1851b9d97904f75bbed90a34b65b74f944d896bc28551c46133
font_02_sfnt_off00009296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9296 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000a5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5BC 18476 bytes
SHA-256: 219409e4a96e727ac7d03afbf10b928993c8ec078f24206d8d8724722cb954a1
font_04_sfnt_off0000c859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC859 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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