Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa0ea260c17b158e…

MALICIOUS

PDF

47.6 KB Created: 2021-06-04 03:17:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4a823a0d3f078b48f0e1aecfe8da15cd SHA-1: f41848bdb1fc82572cdfb864532d5855213008b7 SHA-256: aa0ea260c17b158e47feb71dae35077c775217cb2c2c91258212cb44b30555d0
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 0.9769

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/406889139/how-to-hack-coin-master-spin-game-hack.
  • 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.online/app/406889139/how-to-hack-coin-master-spin-game-hack PDF link annotation
    • http://perpus.masda.ac.id//repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/fake-gps-for-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/play-roblox-for-free-unblocked_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005398.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5398 25672 bytes
SHA-256: d7bb490c8085922332949ded40f88fd25a19a6c41e24127b46a847ed91f8a74f
font_01_sfnt_off00008d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D91 2944 bytes
SHA-256: a0301b7f2c576e4a889a11eed4f4f7770c47239120b218cd3fd1d2cb36c2aaf5
font_02_sfnt_off000097ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97BA 18056 bytes
SHA-256: 5e82f79f4c6ef45b1ad688a3ba1018d76c0b9c4c9956dd607c838570fa3f70c1

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