Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e8920ad79c9ccd6…

MALICIOUS

PDF

43.5 KB Created: 2021-05-15 17:22:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0f6f964f8ab8f8e08e511ae6bbed4d1c SHA-1: eb76b35529495590d58926fc4cbc22dada9fe3b5 SHA-256: 6e8920ad79c9ccd63097278837f72c4376a1a2d6b1f06141970e8cdbbe5e0e42
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are related to 'free Robux' or game hacks, indicating a lure for users. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to potentially harmful websites, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/robux-offer-wall-game-hack
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/give-free-robux_GM431946152.pdf
    • https://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-as-a-kid_GM431946152.pdf
    • https://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/how-do-you-get-roblox-for-free_GM431946152.pdf
    • https://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/game-hack-coin-master_GM406889139.pdf
    • https://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/roblox-com-free-robux_GM431946152.pdf
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdf
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/app-for-free-spins-on-coin-master_GM406889139.pdf
    • https://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/promo-codes-to-get-free-robux_GM431946152.pdf
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-31-march-2021_GM406889139.pdf
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/how-to-earn-free-robux_GM431946152.pdf
    • https://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-ios-download_GM406889139.pdf
    • https://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-2021_GM431946152.pdf
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/robux-free-gift-card_GM431946152.pdf
    • https://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins_GM406889139.pdf
    • https://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/coin-master-ultra-attack-hack_GM406889139.pdf
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/coin-master-apk-hacked-3526_GM406889139.pdf
    • http://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-online_GM406889139.pdf
    • https://elearning.mtsn2magetan.sch.id/__statics/gudangsoal/files/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004dd1.bin
d292975c2dc613b5be9d4632fc948de84305e35af790b4296fd8af66a80d62d1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DD1 24984 bytes
font_01_sfnt_off0000876e.bin
fa82912c9e36e73f744cfc3a856a8c89ccc54bfc28e0c80a649179b290e2af39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x876E 18348 bytes

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