Malicious PDF — malware analysis report

Static analysis result for SHA-256 54ec683316038605…

MALICIOUS

PDF

45.8 KB Created: 2021-05-10 19:34:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8ad946e0c3d4f63cdc4ef31fdc47c5f0 SHA-1: 5b5562b67a5495324bbe81abac98e57ab17e92a6 SHA-256: 54ec683316038605245174faff67088249fd86ba42ccf783d925cc78e932d6fe
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to files with 'hack' or 'free spins' in their names, suggesting a lure for downloading potentially unwanted or malicious software. The ML classifier also flagged this PDF as malicious with high confidence. The document body and embedded URLs indicate a focus on game-related cheats and hacks, likely to entice users to click through to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/how-to-get-more-spins-on-coin-master-for-free-game-hack
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-do-you-get-roblox-money_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-gift-cards_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-box_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/roblox-hack-ga_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-food-for-pet_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-to-get-free-roblox-hair_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/oprewards-robux_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/play-minecraft-pocket-edition-for-free_GM479516143.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/regal-world-coin-master_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/hacks-to-get-free-robux_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-spins-link-in-coin-master-2021_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-to-get-spins-for-free-on-coin-master_GM406889139.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/will-minecraft-dungeons-be-free_GM479516143.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/inappropriate-roblox_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/get-free-robux-today_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/robux-2021_GM431946152.pdf
    • http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-can-you-get-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cdd.bin
6410fad335fcd7a2b23157ce93e4081724fbaa2cad055cb64e906a021b8429d2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CDD 25420 bytes
font_01_sfnt_off00008765.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8765 2840 bytes
font_02_sfnt_off00009116.bin
fa2464eaebfb8d03ead71eceb596d04c94d28f156e1826a2469de3cf6995c318		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9116 18052 bytes

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