Malicious PDF — malware analysis report

Static analysis result for SHA-256 231a20415d7bdb03…

MALICIOUS

PDF

33.3 KB Created: 2021-06-21 00:37:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d9b52f3ab86acf0c17356f04f4c72042 SHA-1: be0a958406b56aff9906308c37cb3b8d7d661fa3 SHA-256: 231a20415d7bdb03d3ccfe0e8e1c0b64f42d3a1d7177c0feb0dde3c8c4893fe4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that advertises hacks and generators for popular games, aiming to trick users into downloading malicious content. The ML classifier and PDF SEO link farm heuristic strongly indicate malicious intent, likely to distribute malware or facilitate scams. No scripts were extracted, but the overall structure and content suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/roblox-jailbreak-hack-2021-september-game-hack PDF link annotation
    • http://sv-nahetal.de/images/picture-roblox_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/how-to-get-your-roblox-account-back-if-hacked_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/counter-blox-esp-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-roblox-gift-card-codes-december-2021_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/roblox-prison-life-hack-mac_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off0000292c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x292C 22200 bytes
SHA-256: 8fd8d9e94362ffd5f078b8f62468941c430a40d1014b84ac1bb053fb43e34b60
font_01_sfnt_off00005aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAA 19884 bytes
SHA-256: afe4c16afa2519586f31b8a6b5e3fb59e3eee8c7938dfaddff7855135319b4a0

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