Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e80a437b9778b70…

MALICIOUS

PDF

46.5 KB Created: 2021-05-17 15:45:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1bfe6e217149ba3daaf575a5884a049d SHA-1: b23856c0cd9e8238de4bca27b05001490ee8cdfe SHA-256: 7e80a437b9778b70e1e8fae7b49fbcb0fa1655fc88e1d019f4a75a9902f83222
142 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and a large number of external links, many of which are SEO-optimized PDF gateways. The primary URL, https://netcdn.xyz/app/431946152/free-robux-without-human-verification-game-hack, and numerous others hosted on algierimasonry.com, suggest a scam aimed at tricking users into visiting malicious or phishing sites. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-without-human-verification-game-hack PDF link annotation
    • http://algierimasonry.com/images/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://algierimasonry.com/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/gain-robux_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4801 26212 bytes
SHA-256: 6c35f828cde41356edb9f5c9e7ca4515f9c3d38df2b7ae3f8782ecc08ae26571
font_01_sfnt_off00008380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8380 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9091 19224 bytes
SHA-256: 69162c0303826e3a88150cee7b6b12b50ba56e04bc46253c0e5eb9f80ac8a399

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