Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e28c5bfe332d5f9…

MALICIOUS

PDF

34.0 KB Created: 2021-06-28 09:03:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3cdddb6d27e4a5e83cec35a36d477472 SHA-1: f044d82777baf2075cb68cdc782713bab824e196 SHA-256: 0e28c5bfe332d5f91785d4c826d00b6a4d23e9961b3f22c52d9b2f07817dd1cc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector, that promise free game currency or hacks. The primary lure is 'Get Free Robux Now Easy', directing users to http://netcdn.co/app/431946152/get-free-robux-now-easy-game-hack. This suggests a phishing or scam attempt to redirect users to potentially malicious sites. No scripts were extracted, but the PDF structure and embedded URLs indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/get-free-robux-now-easy-game-hack In PDF document text
    • https://cleansui-home.com.tw/image/data/files/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/how-to-get-free-robux-easy-on-tablet_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/goo-recording-for-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/tiktok-free-videos_GM835599320.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/free-sound-id-roblox_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/roblox-rape_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/free-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/how-to-get-robux-in-roblox-for-free-on-pc_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E72 22300 bytes
SHA-256: 6b46c5442d5d6ea982c79dbb0c1b33a9a3245001a0c86ca0b54d41452d8bc9aa
font_01_sfnt_off00005f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F51 19164 bytes
SHA-256: eb62aab568dbad7e3e9747291f930f24fb1e9f993a7f36c7edf60258b9d4ba12

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