Malicious PDF — malware analysis report

Static analysis result for SHA-256 b23cc771400525c8…

MALICIOUS

PDF

35.1 KB Created: 2021-06-25 23:37:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a516c50a6be9f2c23e7413769b8d6cb3 SHA-1: 16b01e23ad9a6a30e9ea16a33b0ca1e2877f6b2b SHA-256: b23cc771400525c8d7c9056d050d4767478b13d53c3b51cdc11b34e36cc80ec7
102 Risk Score

Malware Insights

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

This PDF contains a large number of external links, many of which are SEO-optimized and point to pages offering game cheats and hacks. The ML classifier strongly indicated maliciousness, and the presence of a download button lure reinforces the intent to trick users into clicking these links. The primary goal appears to be directing users to potentially malicious websites or facilitating the download of unwanted software.

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/images-of-john-doe-hacker-roblox-game-hack
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/free-robux-no-verification-at-all_GM431946152.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-twitter_GM406889139.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/robux-hack-generator_GM431946152.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/free-spin-and-coin_GM406889139.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/link-for-free-spins-on-coin-master_GM406889139.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/coin-master-free-spins-hack-2021_GM406889139.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/free-coins-coin-master-spins_GM406889139.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/actual-free-robux_GM431946152.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/hack-download-mega-innovation-roblox_GM431946152.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/coin-master-hack-online-android_GM406889139.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/free-roblox-exploits-mobile_GM431946152.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/free-roblox-badges_GM431946152.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/coin-master-heaven-free-spins-and-coins_GM406889139.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/how-to-get-free-robux-without-email_GM431946152.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/free-gfx-roblox_GM431946152.pdf
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/robux-generator-no-human-verification-or-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030ea.bin
289e058ebc715024eb10549731289757e868fe4aa9c1b8ffd0b71cd70be044eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30EA 22628 bytes
font_01_sfnt_off0000631f.bin
e918f8dac985f7c1f18f1b389ac997ea073e7c5acc37377c42d3b5b4b2952ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x631F 19416 bytes

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