Malicious PDF — malware analysis report

Static analysis result for SHA-256 909e52b7aabaea29…

MALICIOUS

PDF

42.2 KB Created: 2021-05-14 12:03:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ca7c5fc2faac9c9ed56877adecbe627b SHA-1: 5c535075486250cc1b0e9986776daed9fe3a1181 SHA-256: 909e52b7aabaea294b7c7e3627053883959e6b7a0c694e375807499fa26f8b91
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links, one of which, 'https://netcdn.xyz/app/406889139/haktuts-coin-master-free-spin-link-game-hack', is identified as a malicious redirector. The document body and heuristics suggest a lure for game-related cheats or generators, aiming to trick users into navigating to potentially harmful sites. The presence of multiple similar links reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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/406889139/haktuts-coin-master-free-spin-link-game-hack In PDF document text
    • https://smark.com.tw/image/data/files/original-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-apk-download-for-android_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/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49FF 25084 bytes
SHA-256: 9be18957e421810d97f381cd157fb784e6e78c3bd2a43b4e723f09b132c8905e
font_01_sfnt_off00008304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8304 18196 bytes
SHA-256: d21f7c9777ff22c572caba6bc61bff535e054503ba9d308437b2513133ac2854

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