Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fea59d120c3bef7…

MALICIOUS

PDF

43.5 KB Created: 2021-06-04 00:20:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 03173bfcf4343035b493f0bcea1bd905 SHA-1: a12e6c331eef47ad1e2e418e93fdba25427ee01b SHA-256: 5fea59d120c3bef72e3192c09af684a7eeb0ece36044df54e2e04d79f8af354b
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are algorithmically generated and point to SEO spam pages related to games and hacks. This indicates a link farm designed to drive traffic, likely for phishing or distributing further malware. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 https://netcdn.online/app/835599320/tiktok-bots-free-game-hack PDF link annotation
    • http://otomasi.stikesmuhgombong.ac.id/repository/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/pubg-uc-660_GM1330123889.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/tiktok-free-on-google_GM835599320.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/roblox-jailbreak-hack_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_004_off00004dd8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DD8 26264 bytes
SHA-256: a0180074bf7d0037b346ec61137bddccf9a167b9caae7557af5e8d2a2e7f7f60
font_01_sfnt_off0000892c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x892C 17672 bytes
SHA-256: a5748a306d5dedee6cef7287dd19bf3453addeb109c4adb95b5d1029b10657c0

Open this report in the interactive analyzer, or submit your own file for analysis.