Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d951ed3c12cc1e7…

MALICIOUS

PDF

46.7 KB Created: 2021-05-13 19:42:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f99625661463f4a446a67561405e4380 SHA-1: 433d063e25cc56781357c010fd39b24240f819b2 SHA-256: 6d951ed3c12cc1e7d9af5aba250e8eb09a7b7a837a7e055de7f7ea646ded673d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are part of a link farm designed to appear as legitimate content related to games and generators. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' lure further supports a malicious intent. The document likely serves as a lure to redirect users to malicious sites, potentially for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/431946152/free-robux-generator-2021-no-human-verification-or-survey-game-hack
    • https://www.stayon.no/images/coin-master-free-spins-daily-fb-champion_GM406889139.pdf
    • https://www.stayon.no/images/coin-master-spin-hack-apk_GM406889139.pdf
    • https://www.stayon.no/images/how-to-get-free-robux-without-verification_GM431946152.pdf
    • https://www.stayon.no/images/free-robux-link_GM431946152.pdf
    • https://www.stayon.no/images/coin-master-free-spins-2021-blogspot_GM406889139.pdf
    • https://www.stayon.no/images/coin-master-hack-online-cheat_GM406889139.pdf
    • https://www.stayon.no/images/minecraft-mods-download-free_GM479516143.pdf
    • https://www.stayon.no/images/coin-master-game-free-download-for-pc_GM406889139.pdf
    • https://www.stayon.no/images/roblox-com-free_GM431946152.pdf
    • https://www.stayon.no/images/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • https://www.stayon.no/images/free-robux-hacks-no-verification_GM431946152.pdf
    • https://www.stayon.no/images/coin-drop-master-free_GM406889139.pdf
    • https://www.stayon.no/images/coin-master-heaven-free-spins-today_GM406889139.pdf
    • https://www.stayon.no/images/coin-master-hack-coins_GM406889139.pdf
    • https://www.stayon.no/images/coin-master-free-2021-spin-link_GM406889139.pdf
    • https://www.stayon.no/images/free-robux-gift-card-generator_GM431946152.pdf
    • https://www.stayon.no/images/robuxmatch-com-free-robux_GM431946152.pdf
    • https://www.stayon.no/images/get-minecraft-windows-10-free_GM479516143.pdf
    • https://www.stayon.no/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • https://www.stayon.no/images/free-robux-without-verification-or-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aed.bin
09ea0361f3bbfe24ee4e5512ef31cceda5896cd6eb5646a7bfd159d6c90f6528
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AED 24436 bytes
font_01_sfnt_off000082f4.bin
43e72e756231cfd354bd65c2ed3b09ad4eff56ad11e7f155ed2920e6bb7860dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x82F4 3992 bytes
font_02_sfnt_off0000901b.bin
76adbda1d3e57e3064df3e292cf485a94c26c1a96e5d3a4e3c484cd1a4e129d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x901B 19556 bytes