Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ebfd6440c30d62c…

MALICIOUS

PDF

35.3 KB Created: 2021-06-26 20:34:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 58d99d09218bd0dd07c3b877a3f73ddc SHA-1: e0ed7c4dc6b91db193f3708934cf392daf7d17cc SHA-256: 6ebfd6440c30d62c77c505d1b926a8321c0e33ebd860c7210c73e094d018d738
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, that point to websites offering free in-game currency and items. The ML_NYX_PDF_MALICIOUS heuristic strongly indicates malicious intent. The document body and extracted URLs suggest a scam designed to trick users into visiting potentially harmful sites.

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/hacked-robux-oh-shit-meme-game-hack
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/how-to-earn-free-robux_GM431946152.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-instantly_GM431946152.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/can-i-get-free-robux_GM431946152.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-spins-coin-master-facebook_GM406889139.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification_GM431946152.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/microsoft-bing-free-robux_GM431946152.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-ios_GM406889139.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-t-shirt-design-roblox_GM431946152.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-robux-easy_GM431946152.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-hacks-2021_GM406889139.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-spin-hack-no-verification_GM406889139.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/promo-code-free-robux_GM431946152.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-50-spin-link_GM406889139.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-on-facebook_GM406889139.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003141.bin
cbc7421d2554b18fbb64ad23e6e6df294fb4d4571e679895c8d241dfe788d327		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3141 22364 bytes
font_01_sfnt_off000062f5.bin
d21e8f21e6dfb6313ac9a2afd75541fb1ce5eccc494f3f34ed2137a6c66ef49c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F5 19744 bytes

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