Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab5e736d3b9203f…

MALICIOUS

PDF

34.2 KB Created: 2021-06-26 12:18:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fb40446be1cf3a3c11977f8d6e881766 SHA-1: 5436605efbb795e6bffd1d288f7afaf807dd9dba SHA-256: 9ab5e736d3b9203f4913039a5ac99ceded95276082a0381141ef99c59e894bbb
102 Risk Score

Malware Insights

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

This PDF document was identified as malicious by an ML classifier and contains a large number of external links, many of which are SEO-optimized and point to pages promising free Robux or game currency. The document body and extracted URLs suggest a lure for users to click on these links, likely leading to further malicious downloads or scams. The primary attack pattern involves social engineering through fake offers to entice users to click malicious links.

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/free-robux-no-download-no-human-verification-2021-game-hack PDF link annotation
    • https://repository.stikesindramayu.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-everything-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/da-hood-roblox-hack_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/descargar-hack-de-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-without-human-verification-ipad_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-models-on-roblox-are-giving-viruses_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/tarjeta-credito-hack-para-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-in-a-game-in-roblox_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-jailbreak-hack-noclip-zip-file-download_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/pokemon-go-free-xp_GM1094591345.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_off00002c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C26 22132 bytes
SHA-256: 9b5486bff427c78705fcc71bcfdab6dcb7e7004252fdb07b495a71a9e5f6391e
font_01_sfnt_off00005d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2F 20316 bytes
SHA-256: c26781fe1b71be88d000c31d002072bd75557e44f33d3b2117328857d9dd0521

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