Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc8de17c86a348d…

MALICIOUS

PDF

46.8 KB Created: 2021-05-19 02:04:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6a5c483c7a082bc1cd9f7c852cc237c3 SHA-1: b5e4fc618a4f467756283eba7fa0510cbdf2eb01 SHA-256: 2dc8de17c86a348d83bb0f7bd450600a75c5ac0aa884629128ec2598aebecfb4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are SEO-optimized and point to sites offering 'free coins' or 'hacks' for games. The presence of a 'PDF_SEO_LINK_FARM' heuristic firing indicates a deliberate attempt to create a link farm, likely to drive traffic to malicious or scam-related websites. The document body and extracted URLs suggest a social engineering lure related to in-game currency and cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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 https://netcdn.xyz/app/406889139/free-coin-master-coins-2021-game-hack
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/coin-master-free-spin-daily-link_GM406889139.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/websites-that-give-free-robux_GM431946152.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/easy-robux-generator_GM431946152.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/coin-master-100-spin_GM406889139.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/legit-coin-master-hack-no-human-verification_GM406889139.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/free-private-minecraft-server_GM479516143.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/earn-robux-today-earn-robux-today_GM431946152.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/toolbox-for-minecraft-pe_GM479516143.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/instantrobux_GM431946152.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/minecraft-tower-defense-hacked_GM479516143.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-app-download_GM406889139.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-in-pc_GM406889139.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/apps-to-get-free-robux_GM431946152.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/minecraft-hax-download-no-virus_GM479516143.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-java-free_GM479516143.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/microsoft-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e40.bin
a6bb326910b3b752a5bef2528862b48e7d4c7b1b1a605109086f8d3d566f0ada		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E40 25116 bytes
font_01_sfnt_off00008809.bin
d859fd77b85f3b3415639a87e8809ecf698e2c52ea4a2633c07d9e96259cae8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8809 3620 bytes
font_02_sfnt_off000094cd.bin
b90a52bb7a513cac6c35a142a2cc06d16f7dce6089e69086c8d165c3db595bed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94CD 18112 bytes

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