Malicious PDF — malware analysis report

Static analysis result for SHA-256 3952271a98fe2898…

MALICIOUS

PDF

46.9 KB Created: 2021-06-07 20:59:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 204b23e4c891b55f3bd30f6312a44eaf SHA-1: 27fb28bd9683b0f9e6ae8ba65380e407a53dba4a SHA-256: 3952271a98fe2898c5bfca806f1b3191b2bca8facbe4bd95ddeceaeaf990b913
142 Risk Score

Malware Insights

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

The PDF document contains numerous links, identified as a link farm, and displays a fake CAPTCHA to trick users into clicking them. The primary URL, https://netcdn.tw/app/431946152/phlego-films-roblox-free-badges-game-hack, suggests a lure related to game hacks or cheats. The document's structure and content strongly indicate a phishing or scam attempt designed to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/phlego-films-roblox-free-badges-game-hack PDF link annotation
    • http://vagency.us/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/how-to-hack-roblox-accounts-2021-with-wireshark_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/how-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/roblox-com-www_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/robux-get-com_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/get-free-followers-on-tiktok_GM835599320.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_004_off00004f8c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F8C 24556 bytes
SHA-256: 2431d784d749675d7f8b5eae2f6beae56a818489b23b7963b1b199d546c9837d
font_01_sfnt_off000087c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87C0 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9172 19340 bytes
SHA-256: 3faf5835d72a5a120f6c9a42b501fbf06738323745c5065847e8ffd4b90cc74e

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