Malicious PDF — malware analysis report

Static analysis result for SHA-256 348cf5e990387494…

MALICIOUS

PDF

31.9 KB Created: 2021-06-29 04:06:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 58908b7812841624e77a13107d93f80a SHA-1: f7739fc1d963b72aaa16eba8fc8ab67856ffc55e SHA-256: 348cf5e9903874948bea718a313304cf1ab2d9f12b551c25cb9ef6f2f9a0b394
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that are part of a link farm, aiming to trick users into clicking on them for 'free' game currency or items. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to lead users to potentially harmful sites or downloads. No scripts were extracted, but the structure and content strongly suggest a phishing or scam campaign.

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/835599320/free-tiktok-likes-trial-game-hack PDF link annotation
    • http://elibrary.smknesbu.sch.id/repository/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hack-robux-2021-inspect-element_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-the-legendary-swords-rpg-hack-script_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/can-users-on-roblox-make-free-hats_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-csgo-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-always-works_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-fairy-tail-online-fighting-magic-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/mad-city-crime-hack-download-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-hack-in-prison-life-20-roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-marketplace-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-bc-in-roblox-patebin_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_off00002b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B98 21596 bytes
SHA-256: 62691339ab8c39e2d26fe31954b410065d1b3256b4a29ff1f365490699736858
font_01_sfnt_off00005b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B17 18048 bytes
SHA-256: 79ac6f62d09ddaae7b94436d308edb87f31d51d173a73ee189228e1c92a6fbae

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