Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ad1400c09dce35…

MALICIOUS

PDF

34.5 KB Created: 2021-06-27 17:47:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2e4cf2a5596678d4098fca278070c921 SHA-1: 10eb8c1388eea72fd05be9ef3fd3b31bb78b1f54 SHA-256: a6ad1400c09dce353a4c487030b816ba3657351bc5dd965195adede86a043f9f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that explicitly advertises 'Free Robux' and game hacks, indicating a lure for users to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm heuristic further supports its malicious intent. While no scripts were directly extracted, the embedded URLs suggest a phishing or malware distribution attempt.

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/free-robux-with-developer-tools-game-hack PDF link annotation
    • http://easytransferbrazil.com/images/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-hack-lab-experiment-roblox_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-use-hacking-scripts-on-roblox_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-get-a-free-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • http://easytransferbrazil.com/images/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-get-free-robux-and-tix-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/dungeon-quest-roblox-item-hack_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://easytransferbrazil.com/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/item-roblox-free_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-get-free-robux-2021-november_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://easytransferbrazil.com/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/robux-free-co_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-robux-for-kids-no-vertification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D4E 22564 bytes
SHA-256: 733f47afc85eb57d5fc6cfcf85cc4362853430ef75845f877f1b05f10974862b
font_01_sfnt_off00005f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F93 19836 bytes
SHA-256: d01132b9c84108ea04a501a9be9bc018e3a0899495acd50408a75d61fc114487

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