Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa9caaeebe934ad…

MALICIOUS

PDF

44.2 KB Created: 2021-06-09 15:14:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e2c697a00ca2f2ecc3afa835ec7be450 SHA-1: 93c894dec832fa333007e59e64f0c2606302cd36 SHA-256: 7aa9caaeebe934ad9130f7945f189dd99d61128de54d0870caa8d2c1139c3a0c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to websites that promise free in-game items or hacks. The ML_NYX_PDF_MALICIOUS heuristic also flagged the document with high confidence. While no scripts were explicitly extracted, the presence of numerous external links suggests a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

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.tw/app/431946152/free-roblox-haker.com-game-hack
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-spin-coin-master-game_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-minecraft-gift-codes_GM479516143.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/comment-hacker-roblox-pour-avoir-des-robux_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/pokemon-go-free-codes-november-2021_GM1094591345.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-robux-websites-that-work_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/worst-client_GM479516143.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-spins-on-coin-master-2021_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-download-hack_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-minecraft-pe-server_GM479516143.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/roblox-free-svg_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-free-spins-fb_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-free-spins-and-free-coins_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-coin-master-spins-blog_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-free-spins-link-march-2021_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/synapse-roblox-free-download_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-to-hack-roblox-project-pokemon_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005133.bin
a669d0ddd37a6fd3bc1fd8fdb79198d76c4e5e8a908d57de59baae3fdcf3cce0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5133 24408 bytes
font_01_sfnt_off000088ee.bin
7268247f5d679e3a456f190c729055484b2ecedeefbf69107fc30782b44cd8e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88EE 18672 bytes

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