Malicious PDF — malware analysis report

Static analysis result for SHA-256 54514de80f62602d…

MALICIOUS

PDF

46.9 KB Created: 2021-06-10 13:18:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2123750da2a841fc471df04ced4d588d SHA-1: 9ef5cf3a51080ca72d7de1c79def3c329c9560c4 SHA-256: 54514de80f62602dec8467db526ffb1281691b6c1d198774db7e3027fa4e4c87
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and a document body that attempts to lure the user into downloading game-related content, such as 'free Robux' for Roblox. The presence of a large number of external links, many with numeric slugs, suggests a link farm designed to host malicious files or redirect to phishing sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/project-alpha-hack-roblox-download-game-hack
    • http://iba.org.fj/wp-content/uploads/fsqm-files/free-robux-no-verification-or-survey_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/can-i-get-minecraft-for-free_GM479516143.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/coin-master-free-coins-link_GM406889139.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/free-robux-2021-real_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/donttazemebro-roblox-person-hes-a-hacker_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/free-promo-codes-for-robux_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/free-long-good-roblox-names_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/free-promo-code-generator-roblox_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/roblox-online-no-download-free_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/how-to-get-free-robux-credit-card-generator_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/free-robux-2021_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/free-doge-head-roblox_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/free-roblox-jpg_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/codes-free-robux-on-bloxland-youtube_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/roblox-com-mobile-hacks-for-free_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/roblox-dynamic-ship-simulator-hack_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/adopt-me-roblox-hacks_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/free-roblox-accounts-dump_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/free-robux-pastebin-promocode_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/how-to-get-free-robux-no-verification-or-survey-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005117.bin
5591b8ec36b747a6cd4307f0f97b893852c06bc1e22d5de5fc417368a2499470
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5117 28180 bytes
font_01_sfnt_off0000915f.bin
f24e55eadbbc20149e9312385d62109d2d9c13b3f0cab39e1354364029c33935
pdf-font-stream PDF embedded font (sfnt) at offset 0x915F 19476 bytes