Malicious PDF — malware analysis report

Static analysis result for SHA-256 19cd947388ce4308…

MALICIOUS

PDF

34.5 KB Created: 2021-06-29 04:54:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 84dadd7ffbe15e81382338f592457d04 SHA-1: cb394ef6974058fadacc4d26489f22aeef7c6dcc SHA-256: 19cd947388ce430858f3cd3f67d3e2c6b76ff7ba3ac5880b40bebdee82c96f99
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are SEO-optimized and point to game-related hacks and free in-game currency. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to lure users to these external resources. The document's content and structure strongly suggest a phishing or scam attempt.

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/roblox-tankery-hack-game-hack PDF link annotation
    • http://digilib.stiki.ac.id/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-royalty-free-music-ominous-60_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-tycoons-free_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/cheat-engine-bypass-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/hack-para-trials-simon-says-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-t-shirt-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_off00002fee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FEE 22664 bytes
SHA-256: 7c6548328b6e17ed59892f6b3f94fdf8742252e26c6b5e479e8c55c1e19aafbb
font_01_sfnt_off0000625d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625D 18836 bytes
SHA-256: e63fbe057d5a1a5779c10b35cd1a80dbdf882b2695c3c05c8703209d0f10cae0

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