Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa433c1703457f4…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 04:45:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c9f4c3808d2d5c7e0aaf5739c1144b7f SHA-1: ee3191208ffc29dadd1a1cd3f028b4ac3a62b30e SHA-256: 3aa433c1703457f449bc0232377696de5b2e1ae225ca390970d97fd4a10c31c9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a suspicious URL. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded URLs further supports a phishing or scamming attempt. No scripts were extracted, but the document's structure and content point towards a social engineering attack.

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/431946152/free-robux-net-game-hack PDF link annotation
    • http://cleansui.com.tw/image/data/files/pokemon-go-free-revives_GM1094591345.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/jake-paul-merch-roblox-free_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/roblox-online-free-play-now_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/roblox-hacks-v65-free-no-downoald_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/click-kill-hack-roblox_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-robux-robux-robux-obby_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-level-7-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/best-free-gear-in-roblox_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E5C 22164 bytes
SHA-256: 044f2d57b74bc981ebe132b11dbe7a67a1a9332cdd9b24268e97fa3da0f323b6
font_01_sfnt_off00005f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F70 18820 bytes
SHA-256: ca85981c18dc15ba0057413255a9444b5a0283357368fb65870b2d832d7eb440

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