Malicious PDF — malware analysis report

Static analysis result for SHA-256 142f7ab3cf296d45…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 23:57:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7c0b00a2592cd45954c705686d1a4233 SHA-1: 732dcc56bf19559e028f18e0444c3fe82f6f83f1 SHA-256: 142f7ab3cf296d454791ac8a51aa124b264898deb52a767d7d7b2e968cf2e1c4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to URLs advertising game hacks and generators. The ML classifier strongly indicated maliciousness, and the PDF_GAME_HACK_REDIRECT_LURE heuristic confirms the deceptive nature of the content. The primary IOC is the malicious redirect URL, which is likely used to deliver a secondary payload or phish for credentials.

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/406889139/pop-slots-free-vegas-casino-slots-machine-game-coin-master-game-hack PDF link annotation
    • http://library.stieyapan.ac.id/repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/claim-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/pokemon-go-free-account_GM1094591345.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/tiktok-free-10-followers_GM835599320.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/sites-to-get-free-robux_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_off000050f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F5 23872 bytes
SHA-256: b58c4c8b918b694929036b942c1541e1d022fa5efde7b32cd6f91316592138f5
font_01_sfnt_off000086e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E0 18960 bytes
SHA-256: 1c2867144f4dcbe006f7dd1ea5adad3b4b3257689db3166d94319e477c45a36b

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