Malicious PDF — malware analysis report

Static analysis result for SHA-256 584dfcd2091b55f0…

MALICIOUS

PDF

45.3 KB Created: 2021-06-09 13:38:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 32a8edebb7303f5e09bec3fd6ebc18be SHA-1: d0232deff14e8c1b8c3c45bd6052318297b455ed SHA-256: 584dfcd2091b55f0ef273371fb1f16a646496a48d50c6653304dcd9a419dde64
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 0.9864

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.tw/app/431946152/free-obfuscator-2021-roblox-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id//repository/pubg-uc-u-mobile_GM1330123889.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-money-glitch-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-no-verivaction_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • https://www.semrush.com/prices/In 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
stream_004_off000052c3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52C3 25124 bytes
SHA-256: 49032e4bda86e896545e4a57135f494c21ae60cdf030514c595e67a1baf54208
font_01_sfnt_off00008c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8D 18820 bytes
SHA-256: a75c27c4cf24c51b6c32824538b7cdb4a1ee0d7d7e3f549d9a096ebcce702483

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