Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e840ca0fc8494de…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 23:43:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ddad8eb6c836964b700fb824fb21b618 SHA-1: 65c1aac285224a94e493790c25fbd1afc62a99af SHA-256: 4e840ca0fc8494de902f3b936118bcd1df1f9a65c111512d764a8e226cf35b0d
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.tw/app/406889139/coin-master-fan-page-facebook-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-four-free-items_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/ninja-zone-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/asshurtv2-roblox-hack_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-face-roblox-hack_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-coin-master-gift-link_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/greg-hacker-roblox-account_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-use-inspect-element-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-jailbreak-hack-endless-robbing_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_off00003475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3475 22540 bytes
SHA-256: 689b3f5980b2766e496e5bd45319c482e87fc7ce273fd5dd9d1d30a5e7001ab9
font_01_sfnt_off000066b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B2 18480 bytes
SHA-256: c41ef087e97e4ddba89d6c7aa526d87d7844b370b1276ac9bee0370a506b134e

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