Malicious PDF — malware analysis report

Static analysis result for SHA-256 6432ac19b79a1d24…

MALICIOUS

PDF

35.8 KB Created: 2021-07-09 13:38:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9db6eea8990a363a3f25a753f234a574 SHA-1: c70fd8acf6d53de00f7219408e58a70d18c3e793 SHA-256: 6432ac19b79a1d2415e850a4c84dc9fdd6061b92ef8fb686dd28a61d763152e7
102 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are hosted on a domain associated with SEO link farming. The document body and extracted URLs suggest a lure for users seeking free in-game currency or hacks for games like Roblox and Coin Master. The ML classifier strongly indicates malicious intent, likely to redirect users to malicious sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://netcdn.tw/app/431946152/how-to-hack-someone-account-on-roblox-2021-game-hack PDF link annotation
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/free-coin-master-s_GM406889139.pdfIn PDF document text
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/discord-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/best-free-outfits-roblox_GM431946152.pdfIn PDF document text
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/inf-jump-medefire-hack-script-for-phone-roblox_GM431946152.pdfIn PDF document text
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • https://mtsn1kebumen.sch.id/__statics/gudangsoal/files/free-robux-by-watching-ads_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_off00003306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3306 22276 bytes
SHA-256: 61386eca3931d126277f4c6626ad33db00287a95ea88fd925ea479bdd5eef3b3
font_01_sfnt_off000064b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B9 19724 bytes
SHA-256: 19a723b07b89ce392d3c0a300304fa32e31e8cec889fc0d8858a59cb74805f45

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