Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04ff4fe49ffe4ef…

MALICIOUS

PDF

44.8 KB Created: 2021-05-14 07:07:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: aff9d306d201ec2dfeec6284d59f10de SHA-1: db4c8dfc6a69232ad510ba89f0b2fdaf5d619116 SHA-256: b04ff4fe49ffe4efb1527be055108db63619d416c85d6dc173ce45ad0d9af99d
200 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, disguised as game hacks and generators. The document body and heuristics indicate a social engineering lure, specifically a 'ClickFix' type attack, instructing the user to interact with the malicious link. The primary malicious URL identified is https://netcdn.xyz/app/479516143/minecraft-pocket-edition-hack-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/minecraft-pocket-edition-hack-game-hack In PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/robux-match_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-ftw_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-free-robux-no-human-verification_GM431946152.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
font_00_sfnt_off00004a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A49 24960 bytes
SHA-256: aaf3bcd10cb40e6f2639f78157944778c16848c7fcfb1e914f47583af392e958
font_01_sfnt_off00008274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8274 3056 bytes
SHA-256: dd24a0ab94df4552e459bd06fd01b0fd3f021c1d51d1d64407070e735974a028
font_02_sfnt_off00008ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE7 18208 bytes
SHA-256: 8dadf0fd28e98d89ce6fd9d7956b131e74aedd91cd69dedc14cee10df05e92c0

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