Malicious PDF — malware analysis report

Static analysis result for SHA-256 a164e7ba62ff5cac…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 21:42:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2a0117e47f5f05b6e7f4df61522e2636 SHA-1: 7e0434e87ed8a37cbeeb8d5e5ea1d8d1f1b6ee05 SHA-256: a164e7ba62ff5cac7769633ad80e26dee4313579dfcc8acc2ab31fe6099dd5ee
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, that point to websites offering game-related cheats and downloads. The ML_NYX_PDF_MALICIOUS classifier strongly indicated maliciousness. The document body and extracted URLs suggest a lure for users seeking free in-game items, likely leading to further malicious content or scams.

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/free-roblox-acc-game-hack
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-robux-download_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/coin-master-free-cards-link-2021_GM406889139.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/roblox-generator-no-human-verification_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/moonactive-coin-master-free-spins-link_GM406889139.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/earn-free-robux-on-roblox_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/app-store-coin-master-free-spins_GM406889139.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-hacks-for-coin-master_GM406889139.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-spins-in-coin-master-without-human-verification_GM406889139.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/coin-master-free-spin-2912-2021_GM406889139.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/roblox-check-cashed-v7-hacks_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/robux-free-gift-card-org-hack_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-robux-apk_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/youtube-how-to-get-free-robux_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/roblox-promo-codes-for-free-robux_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/earn-robux_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-robux-thumbnail_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/minecraft-114-download_GM479516143.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/robux-rewards_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/is-minecraft-education-edition-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e45.bin
66773724cbfd3343f0edb38d79b2aa29b3680cb7b13c11354135d68899da4e3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E45 22788 bytes
font_01_sfnt_off00006177.bin
897dbc28d09cb323d8d959c0643642adc43f046846d73b8db675e87b41f7de50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6177 18652 bytes

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