Malicious PDF — malware analysis report

Static analysis result for SHA-256 419400d994b9562e…

MALICIOUS

PDF

41.7 KB Created: 2021-05-16 19:09:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6f548a7502263ed698b5271c30d771f2 SHA-1: d327828a86fd50fd80cd3b5e47bf0ec82fccdd2a SHA-256: 419400d994b9562e7bf3a286d16f29f5076e0a9e53fbf0e7beb5783203148dd0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a prominent external URI, all related to game hacks and free spins, indicating a likely lure for users to download malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm heuristic further supports its deceptive nature. Although no scripts were directly extracted, the document's structure and embedded links suggest it is designed to facilitate the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/get-free-spins-coin-master-2021-game-hack PDF link annotation
    • http://hostalsalou.eu/images/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://hostalsalou.eu/images/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://hostalsalou.eu/images/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://hostalsalou.eu/images/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://hostalsalou.eu/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://hostalsalou.eu/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://hostalsalou.eu/images/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://hostalsalou.eu/images/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://hostalsalou.eu/images/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004842.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4842 24724 bytes
SHA-256: 46c3cb8291387370f74669c1f1867ca38a0036b893de42c98ff784cd2f7410cf
font_01_sfnt_off00008054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8054 18288 bytes
SHA-256: b38ddf3080d7f2bc752da259c3b03eae0df146b085052c6419baf797dcf0dadb

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