Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd635043152e2a3…

MALICIOUS

PDF

45.0 KB Created: 2021-05-17 09:31:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3a41aba5b80c2bb12839b872028f9be1 SHA-1: 5a41cac979c108ab6d41ca2c4843273d96b7c8fa SHA-256: 3dd635043152e2a345355a4ac11057952dbec24708210a9357935b5b6bde3396
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to SEO-optimized pages related to game cheats and hacks. The ML classifier also flagged this PDF as malicious. The presence of a "download button" heuristic suggests a lure to click these links. While no scripts were explicitly extracted, the PDF structure and link farm indicate a likely attempt to drive traffic to potentially malicious or ad-filled websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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-find-coin-master-free-spin-link-game-hack
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/coin-master-spin-hack_GM406889139.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/minecraft-free-install_GM479516143.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/daily-free-spins-on-coin-master_GM406889139.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/mangocheats-com-hack-coin-master-cheat_GM406889139.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-items_GM431946152.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/roblox-hack-generator_GM431946152.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/coin-master-hacks-reddit_GM406889139.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/robux-generator-no-human-verification-or-survey_GM431946152.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/coin-master-hack_GM406889139.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/coin-master-free-coins-2021_GM406889139.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/websites-that-give-free-robux_GM431946152.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/how-to-buy-robux-for-free_GM431946152.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/hack-minecraft_GM479516143.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy_GM431946152.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/coin-master-spins-for-free_GM406889139.pdf
    • http://e-learning.mtsnparung.sch.id/__statics/gudangsoal/files/hack-xp-net-generators-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bb2.bin
07202caa5b1f54b95c2fae19769cf54a1173271bbe46f7d218fbf224190af2d3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB2 24064 bytes
font_01_sfnt_off000082ce.bin
03f8397bdf627aa5eb6acb233d3c5d547fa213245667a48a7f92829839117302		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82CE 2920 bytes
font_02_sfnt_off00008ce6.bin
92c8e769ce3efc703fa08269aba1ffc4fef719fbc8001ed724dd295d1de288f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE6 18396 bytes

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