Malicious PDF — malware analysis report

Static analysis result for SHA-256 668fb638142a1d62…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 13:18:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5187a55b3a9e9c11f13493977865169e SHA-1: 11cbdee160d382c8a9458a86ecc4e869c0668168 SHA-256: 668fb638142a1d6262944d2cc1a5e9d4688cadcd4b82a554ba8a4a68c5f8d931
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, that point to websites offering game hacks and cheats. The document body also contains a primary URL, 'http://netcdn.tw/app/406889139/how-to-get-spins-for-free-on-coin-master-game-hack', which is likely the intended destination for users seeking illicit advantages in games. This pattern suggests a scam or phishing attempt to redirect users to potentially malicious content.

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.tw/app/406889139/how-to-get-spins-for-free-on-coin-master-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/one-piece-final-chapter-youtube-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-dont-earn_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/ragdoll-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-inspect-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-how-to-get-items-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-use-cheat-engine-65-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-easy-website_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-v3rmillion-hacks-youtube_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hacks-injector-roblox_GM431946152.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
stream_002_off000032a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32A0 23132 bytes
SHA-256: d0e1e2380dc12b6e2212b1dbd0b3d159201374039253f415db1a46d7de9943c5
font_01_sfnt_off000066c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C1 18336 bytes
SHA-256: a841261eefc9091920f66d88f6abc9f0517b4e443c58d75395461243cacd8539

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