Malicious PDF — malware analysis report

Static analysis result for SHA-256 d87b8ec74bb01c87…

MALICIOUS

PDF

43.6 KB Created: 2021-06-03 13:53:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 40a5d65560eeb5bb0baf39d34084a7ee SHA-1: aff3257112251cb7ddbe5b68aa4e13dc2e6118ec SHA-256: d87b8ec74bb01c877e8e5696f64936d261dee2dff5dba1e92e456e3dd22034b5
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a social engineering tactic by presenting itself as a 'game hack generator' to lure users into clicking a malicious link. The document instructs the user to press Win+R or paste a command into a terminal, a technique often used to bypass macro restrictions and directly execute malicious commands. The primary IOC is the external URI pointing to a suspicious domain associated with the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/mcpe-client-game-hack PDF link annotation
    • http://library.ulb.ac.id//repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/clean-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-exploit-download-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/demogorgon-roblox-free-body_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-get-free-robux-without-paying_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_off00005197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5197 25048 bytes
SHA-256: 4d143371a6058c4dda82630e506e4ad7966ebb2b9d7dd584ae2ce12772f29c9a
font_01_sfnt_off00008a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A05 17592 bytes
SHA-256: 4a17134cdde8626f1e1842e656fddffa42f6af1ea5cbed108b9034da6d5c6338

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