Malicious PDF — malware analysis report

Static analysis result for SHA-256 35af2fe86cfbdfad…

MALICIOUS

PDF

44.2 KB Created: 2021-05-19 09:25:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9b31def7c661e7c2546714345af71c7a SHA-1: 100ea3adf8f125b2e914766be1d327a294c6a2aa SHA-256: 35af2fe86cfbdfad8c49dfeae1625ede58b16f44fecbd379e99ae92434602e80
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous SEO-optimized links, many of which point to other PDF files related to game cheats and hacks. The presence of a "PDF_SEO_LINK_FARM" heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The document body, though malformed, contains references to "Minecraft Fly Hack" and URLs that reinforce this lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/479516143/minecraft-fly-hack-game-hack PDF link annotation
    • http://butkimloai.com/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/make-free-robux_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://butkimloai.com/images/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://butkimloai.com/images/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://butkimloai.com/images/coin-master-pc-hack-tool_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_off000048b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B0 25100 bytes
SHA-256: 4e4bbf5ace6765a30edb27e0fd9f956fc07b49b7242d7782e92fb9fcf9edef55
font_01_sfnt_off0000811b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x811B 2892 bytes
SHA-256: c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4
font_02_sfnt_off00008b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B04 17992 bytes
SHA-256: 06651707645ad1f4ebda8b3f746ca430a0b9618d46277a77061ba05985c34688

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