Malicious PDF — malware analysis report

Static analysis result for SHA-256 68238a707e0d57ee…

MALICIOUS

PDF

51.2 KB Created: 2021-06-08 19:31:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: dde7fea33f8206b738a93d1c25e0be7c SHA-1: 3fc13b032b6befe2400983c731ee3d200587a49a SHA-256: 68238a707e0d57ee5d48002c9298d80bed13c354cf1087c8c0959b47ea6cb257
142 Risk Score

Malware Insights

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

This PDF document contains a lure impersonating Facebook, directing users to a URL that promises free game-related content. The document's structure and numerous external links suggest a link farm designed to lead users to potentially malicious sites or phishing pages. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/how-to-make-good-roblox-thumbnails-for-youtube-free-game-hack.
  • 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.tw/app/431946152/how-to-make-good-roblox-thumbnails-for-youtube-free-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/pokemon-go-free-online-download_GM1094591345.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/fast-robux-online_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robux-hack-2021-december_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/lastrick-com-coin-master-hack_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005203.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5203 29740 bytes
SHA-256: 6b696bfe36ab990e42c1b3f469234171dd186d2cd00883b11fe03738db65aa0a
font_01_sfnt_off0000944d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x944D 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000a15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA15E 19832 bytes
SHA-256: c0776f1b5514b202834b453a18c2e4818fff61130ebe67758aa03a80d091c63e

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