Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac7942daa42aa5c4…

MALICIOUS

PDF

34.6 KB Created: 2021-06-27 18:13:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9b0449ba5337137e107161243af6d52a SHA-1: d099183bba37869ece3ec500a44fa5e14166e6d3 SHA-256: ac7942daa42aa5c455261efeb14748d4f3dbc3a35f67ef5f108d329e8fc3ec58
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external websites, many of which are related to game cheats and hacks, suggesting a lure for users to download malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, and the ML classifier strongly flagged this PDF as malicious. The document body explicitly mentions 'Free Roblox Places 2021' and includes a URL pointing to 'free-roblox-places-2021-game-hack', reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.co/app/431946152/free-roblox-places-2021-game-hack PDF link annotation
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/tiktok-free-fans-and-likes-app_GM835599320.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/is-roblox-robux-hacking-banable_GM431946152.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/mcpe-com_GM479516143.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/hack-roblox-executor_GM431946152.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/robux-cheat_GM431946152.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://elearningmts.al-ahliyah.id/__statics/gudangsoal/files/roblox-free-clothes-girl_GM431946152.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
font_00_sfnt_off0000316f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316F 21772 bytes
SHA-256: c115841daa12511f10d90ab3cefa36ddf2b7f095c63ca8deac7cae197d0979b3
font_01_sfnt_off00006179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6179 19208 bytes
SHA-256: 255d9579ad881cea878234fc0f96412d61599da72b22ba515bf45f9dcfad2bc0

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