Malicious PDF — malware analysis report

Static analysis result for SHA-256 d753fa2a0a252cee…

MALICIOUS

PDF

45.6 KB Created: 2021-05-19 12:16:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b4e74943339cc3850aa7256dd1984681 SHA-1: c8aaf0d5eab3d1b59dec3028b15cb4adbde5acb9 SHA-256: d753fa2a0a252ceeb6da04338580886232e8c26c0cf75e29cce3319345eaf020
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, many pointing to other PDF files, suggesting a link farm designed to distribute potentially malicious content. The document body and extracted URLs indicate a lure related to "Coins Master Hacks" and free spins, aiming to trick users into clicking malicious links. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/coins-master-hacks-game-hack PDF link annotation
    • https://my-private-intendant.com/images/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-village-3_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/hacks-and-cheats-for-coin-master_GM406889139.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_off00004949.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4949 27992 bytes
SHA-256: 2a5f4a08c539f9f77e88b8297311dfec0ba28794c05f83c592409e1e0b32c5aa
font_01_sfnt_off00008771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8771 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000915c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x915C 17716 bytes
SHA-256: d488acdeac9c101f8c7dc9d2f61752a744fbde28c1faa2289984f0ec4d4cc76f

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