Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5d8620a07c35303…

MALICIOUS

PDF

43.4 KB Created: 2021-05-14 14:51:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: affefde887e319af2c0a1ee2565d25e7 SHA-1: 3ebb086eabc60945a2759d4a2f63a0ea8aea3d3d SHA-256: d5d8620a07c353038ef41f88665b376dc0c4d42bb88c9c7687ef90871c029ac2
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 0.9969

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-hack-mod-apk-android-1-game-hack PDF link annotation
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-game-hacking_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/mcpe-com_GM479516143.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/free-robux-images_GM431946152.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-free-spins-link-2021-march_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-free-cards-link-2021_GM406889139.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
stream_003_off000049bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49BB 25292 bytes
SHA-256: a75a3e0423b9ce6d1e0f07502a416293877872c8442dd30d5dcdc664bc9df5f0
font_01_sfnt_off000083ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83EF 19328 bytes
SHA-256: f5961842eebd50a5ef6f0e1a54e436c470f2658c48079caa4f58f87df2c0190a

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