Malicious PDF — malware analysis report

Static analysis result for SHA-256 57e486d907a16b0c…

MALICIOUS

PDF

35.4 KB Created: 2021-06-19 18:27:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ae18459db0c4467ff1375f13c5032ac8 SHA-1: ab3a55df619b118c378c2ea01be16e1561c0b0fb SHA-256: 57e486d907a16b0cd890628e804f5dd89e84885ebcdfd4bbff1689545366b3c9
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 0.9980

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 http://netcdn.co/app/431946152/how-to-get-free-robux-promotion-game-hack PDF link annotation
    • http://library.feb.unila.ac.id/rfeb/repository/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/wurst-112-2_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-free-ninja-animations_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/cool-avatars-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-hacks-phantom-forces-old_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/tiktok-free-download-for-windows-10_GM835599320.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/jailbreak-roblox-hack-speed_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-robux-promo-codes-website_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/how-to-hack-someones-roblox-account-2021_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
font_00_sfnt_off00003202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3202 22428 bytes
SHA-256: 6e46202cec7b4c1288fcfd4cc93a1ff99aa5a8b54fd1ed8da031db7057d07b80
font_01_sfnt_off000063fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FD 19516 bytes
SHA-256: ae36eeb1040f5d3fb3cf4baa2eb36a51be550960912fcbeab270a7f9c12b06d5

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