Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2739e0df9e8f1d…

MALICIOUS

PDF

45.3 KB Created: 2021-05-15 14:35:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b52b4cd29864e7b4daa5ef5485ddede5 SHA-1: ce242443f972375b12b327c303f847767e229f0e SHA-256: dd2739e0df9e8f1d33cb54d513b3448339a227604766cefcb2ca682a74c5e91a
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 0.9551

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.xyz/app/406889139/coin-master-daily-free-spins-2021-game-hack PDF link annotation
    • http://baxtton.com/sites/default/files/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://baxtton.com/sites/default/files/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a8a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A8A 24988 bytes
SHA-256: 9f2806f7c6b204a8a707fe5d468fd1408c03378010564f27cf06b719c4fbf421
font_01_sfnt_off0000835a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835A 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0B 18708 bytes
SHA-256: 0e09573a858265cfc65c534eb28458a66078312e2bd7bae94317e03ea41fcd19

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