Malicious PDF — malware analysis report

Static analysis result for SHA-256 0581a384e4a3ef60…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 07:32:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9952aabebaeb2cb48122b8e9e4d6f6b5 SHA-1: e4a79ce1dc3a78a51bfac47c6d8ff76a72e2f922 SHA-256: 0581a384e4a3ef60dc5024a11fc017a2eebfc60e64f1b2f697f97478e95fcd3e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/431946152/roblox-army-free-robux-game-hack PDF link annotation
    • https://library.institutpendidikan.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/https-wwwrobloxcom-catalog-keyword-freecategory-1direction-2_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/pokemon-go-free-12k-eggs_GM1094591345.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-500-free-spins_GM406889139.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_off00005122.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5122 26064 bytes
SHA-256: cdaa212a28a453e07c496b75022f3edd7df609be96a916194e15c7ad62e03d9d
font_01_sfnt_off00008bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD0 18528 bytes
SHA-256: 3fb3182e9b0518fecce2d6326c4443e9fc052433b5a2fc23416796f92e2510b3

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