Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3a1cd28471ade47…

MALICIOUS

PDF

43.8 KB Created: 2021-05-15 08:39:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d1bd9e52c0e7fa0c699621488ecda40d SHA-1: 8b991b141882df8725c8da82a7de3d1531df2dd0 SHA-256: a3a1cd28471ade4723dd1df18f4f9d5384839aa13c49712dc23ad51abe542331
100 Risk Score

Malware Insights

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

The PDF contains embedded links and a visual download button, strongly suggesting a social engineering attempt to trick users into downloading malicious content. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-free-spin-29.12-2021-game-hack, which is flagged as a known redirector. The document body and extracted URLs indicate a lure related to game cheats and free spins, a common theme in phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-free-spin-29.12-2021-game-hack In PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-free-box_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47C5 23940 bytes
SHA-256: f775653761f28f802c46169af7a2c550a1b4fe5d27944de5a7e7e9d10fa15f95
font_01_sfnt_off00007e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E02 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000087b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B3 18520 bytes
SHA-256: 141dfbbd6ef0260aef384770030821a2da7131f416dfa868053a26d6b11c95c3

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