Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c3e8c3fa55078c9…

MALICIOUS

PDF

42.0 KB Created: 2021-05-14 16:51:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 938f2dc282821054dfeff9c0554cd78f SHA-1: a98bcae3720f3a7ba11de54bb4c1a378940c3255 SHA-256: 5c3e8c3fa55078c9756a31213e8d33c520b67be1fa33bdb0d14c22e8b8115d07
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users. It contains multiple links, including a primary malicious redirector at `https://netcdn.xyz/app/406889139/coin-master-free-spins-fb-champion-game-hack`, which is designed to lead users to potentially harmful content. The document's structure and embedded links strongly suggest a phishing or scam campaign aimed at driving traffic to malicious sites.

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/coin-master-free-spins-fb-champion-game-hack In PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/free-robux-images_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-comcom_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/get-free-cards-in-coin-master_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_off00004992.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4992 24704 bytes
SHA-256: 33fcdfb12ce4daf65e028e3f86b25b422a48dd496868d2ad24fbdab7e0b9683b
font_01_sfnt_off0000814a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x814A 18472 bytes
SHA-256: fa7a8e9ba2b69ba0dc6be0410b8e36912589817a3711fa80dfb5f1e628eeb65f

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