Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fbc4aaca919c6cc…

MALICIOUS

PDF

42.0 KB Created: 2021-05-14 22:04:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 70bf6c0f364e0771d6d1983fc51f1677 SHA-1: c7a02a3a49d66744927a5041a972e9d6db913246 SHA-256: 4fbc4aaca919c6cc9aaa7666f5d21ec2604bca9a74ab93fa5d102acaaf411d62
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, identified as a link farm, that direct users to websites offering game cheats and rewards. The ML classifier strongly indicated maliciousness, and the presence of external URIs and a visual download button lure suggest an attempt to redirect users to potentially harmful content. No scripts were extracted, but the overall structure points to a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-free-shields-on-coin-master-game-hack
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/coin-master-rewards_GM406889139.pdf
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-app_GM406889139.pdf
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/free-cheat-codes-for-coin-master_GM406889139.pdf
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/coin-master-free-spins-23-march-2021_GM406889139.pdf
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/free-robux-no-verification-no-download_GM431946152.pdf
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/free-hair-roblox_GM431946152.pdf
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/flip-master-coins-hack_GM406889139.pdf
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/daily-free-spins-on-coin-master_GM406889139.pdf
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/get-free-spins-in-coin-master_GM406889139.pdf
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/free-hair-roblox-boy_GM431946152.pdf
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-app_GM406889139.pdf
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/coin-master-32-hack-apk-download_GM406889139.pdf
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/free-coin-master-spins-without-human-verification_GM406889139.pdf
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-generator_GM431946152.pdf
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/how-to-win-free-robux_GM431946152.pdf
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-download_GM406889139.pdf
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdf
    • http://elearning.mtsn1sby.sch.id/__statics/gudangsoal/files/roblox-com-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049f7.bin
b53ae2c3c8b358563d97cc72afcd89abdbe7cada5945e9844195d928a7393c1a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49F7 24896 bytes
font_01_sfnt_off00008203.bin
9f23db5f7e4aea9ade489dbfee04f76c59a98f319c99e466b9c1fecfdfb20686		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8203 18288 bytes

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