Malicious PDF — malware analysis report

Static analysis result for SHA-256 199d28a3e5ed1db1…

MALICIOUS

PDF

41.7 KB Created: 2021-06-09 02:26:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4fa151a7c15f0f194c9192bd5f04c830 SHA-1: 64d218df2eca0180c59d787348dd16f0dad0a3e4 SHA-256: 199d28a3e5ed1db1e91dc2371929b21dd21874d670d4fcf12888fad8a054faa5
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically targeting users with lures related to game accounts. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs confirms a redirection attempt. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 2

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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-do-i-recover-my-child In PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/pubg-uc-usa_GM1330123889.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/pokemon-go-free-spoofing_GM1094591345.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/robuxglobalcom_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051c7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C7 24600 bytes
SHA-256: 9e5fe2662f87f9dee22fa42c6ee36624476e6c7e1f673258f91cd3ae3bb10725

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