Malicious PDF — malware analysis report

Static analysis result for SHA-256 20cd2bd278b7f175…

MALICIOUS

PDF

44.1 KB Created: 2021-05-18 03:05:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4744ccf4a2ccacc39a7f3c3c51d27b8e SHA-1: 8797ac0f33b5c259931b9aa90f65b87d72e66bf6 SHA-256: 20cd2bd278b7f175059c2bfd0ea2c0a1094369c84d9ae1662c3fba5f63e9693e
200 Risk Score

Malware Insights

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

This PDF document contains numerous links to external resources, many of which are SEO-optimized PDF files related to game hacks and cheats. It also includes a direct link to a malicious redirector and presents a visual lure for downloading software. The presence of a remote support tool lure suggests an attempt to gain unauthorized access or control.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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
  • 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/wurst-1.12-2-game-hack In PDF document text
    • http://internetdeputy.com/images/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://freegiftcodes.euIn 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_off00004a7c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A7C 24484 bytes
SHA-256: dd90edd77680913024a569f0eb8bf09fd44e8a8afff30c6df9253f7a94b5130c
font_01_sfnt_off00008146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8146 2840 bytes
SHA-256: 787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606
font_02_sfnt_off00008b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B05 17856 bytes
SHA-256: 231ed0e7957a5c445c778f0fe1c9318810f2b5562dc1cd2ae15ff2a5633334db

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