Malicious PDF — malware analysis report

Static analysis result for SHA-256 629a367d2eeb06b5…

MALICIOUS

PDF

44.9 KB Created: 2021-05-10 22:39:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c010a0a99683316b0bd62441923996d6 SHA-1: 4a1c93ba6f5b9418af18eec047b2693a6fe95ec7 SHA-256: 629a367d2eeb06b5e5d8ebd7fbbdc61f53752b2b236dd11c8dd9d19415ad58d2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm 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 0.9980

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 https://netcdn.xyz/app/431946152/minecraft-apk-free-download-016-0_gm479516143-game-hack PDF link annotation
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-roebucks-com_GM431946152.pdfIn PDF document text
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/roblox-scam_GM431946152.pdfIn PDF document text
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/coin-master-daily-free-coins-link_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_off000049c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C8 28160 bytes
SHA-256: 546304fa28bb0bc18078e407ffc8e4147c470786e906081fafcfc40874411230
font_01_sfnt_off000086d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D2 20408 bytes
SHA-256: fea8ec5cc1ffd87c9c53219b6be7670fd59374d713bf5647cc5284dd5348e231

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