Malicious PDF — malware analysis report

Static analysis result for SHA-256 278ab7f6a970fc76…

MALICIOUS

PDF

34.0 KB Created: 2021-06-17 20:11:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 97b62d93f5f0a2309a6cc6653ba2dfd4 SHA-1: 95b94df5b7420ae2e0f51e67a8fc6f1c2c518f03 SHA-256: 278ab7f6a970fc76beca9caaeb8fbc2c737f12efc6f3077663cc79f0bf064349
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs that form a link farm, directing users to pages promising free in-game currency or hacks. The ML classifier and PDF heuristics strongly indicate malicious intent, likely to lead users to phishing or malware download sites. No scripts were extracted, but the document's structure and content suggest it's part of a phishing campaign.

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/how-to-get-robux-for-free-no-sighning-in-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id//repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-glitch-easy_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-struicid-stop-start-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-generator-that-actually-works-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/without-human-verification-pubg-uc-hack_GM1330123889.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-apoc-rising-skin-giver-hack-v3rmillion_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/diamond-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF6 21892 bytes
SHA-256: d854280fd3419bebea2a87c2bf55ffdec4541a75e70e6e145b22caa35b1316f4
font_01_sfnt_off00005f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F45 19272 bytes
SHA-256: c9bfd7cd1e99b8d499a796d6d0cfacfa7af4c7fef5acdea8b3f17b9e3effab7b

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