Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c281a2c929e5014…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 16:14:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a5077ed2861ef79a8d88f6c5316cc888 SHA-1: 208ee9f5bf9a1210a1a65852e072a787d47a3011 SHA-256: 0c281a2c929e501457527647525ae712d7cae032199dbb96d37f2109e446ebb2
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/431946152/roblox-sign-in-free-game-hack PDF link annotation
    • https://dentmate.com.tw/image/data/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-injector-pc-free_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/bloxmate-free-robux_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/pokemon-go-free-verizon-code_GM1094591345.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/pet-sim-online-hack-download-roblox_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-rewards-site_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_off00002fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBB 22380 bytes
SHA-256: f23febe6a82b6426e0b2c79bf5c3e83260b03b0697a4605b4576b8a175b0d126
font_01_sfnt_off0000614f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x614F 18768 bytes
SHA-256: 3ab6c6070bd7305523799bfbbbd7e2cf94c32bd360863863c53c92dc8f43febe

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