Malicious PDF — malware analysis report

Static analysis result for SHA-256 a832025e432321be…

MALICIOUS

PDF

47.6 KB Created: 2021-05-11 03:38:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b6bfc40e50e206403a83d601adb27595 SHA-1: 9ed4757b6e31ea99cea7055ce6d41cce2ad336df SHA-256: a832025e432321be5bef02a58b5143cf185e4d42f07b0f7ae218c55e54f1f5ec
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to attract search engine traffic. The document body and embedded links advertise 'free Robux' and 'free minecoins', indicating a lure for users seeking in-game currency or cheats. The presence of multiple external URIs and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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/free-robux-glitch-2021-game-hack
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdf
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/minecraft-free-download-android-apk-014-0_GM479516143.pdf
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/hack-para-coin-master-sin-verification_GM406889139.pdf
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/is-it-possible-to-hack-coin-master_GM406889139.pdf
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/coinmaster-blogspot_GM406889139.pdf
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/coin-master-free-spins-bit-ly_GM406889139.pdf
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-android_GM479516143.pdf
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/minecraft-pocket-edition-free-apk_GM479516143.pdf
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/websites-that-give-free-robux_GM431946152.pdf
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/coin-master-hack-android_GM406889139.pdf
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/get-gold-coin-master-village-hack_GM406889139.pdf
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/como-hackear-coin-master-2021_GM406889139.pdf
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/minecraft-free-education_GM479516143.pdf
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/coin-master-hacker-club_GM406889139.pdf
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/how-do-you-get-free-robux-2021_GM431946152.pdf
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/minecraft-switch-free_GM479516143.pdf
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/roblox-free-robux-hack_GM431946152.pdf
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/coin-master-hack-generator_GM406889139.pdf
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/coin-master-free-spins-1701-20_GM406889139.pdf
    • https://elearning.mtsn1wonosobo.my.id/__statics/gudangsoal/files/how-you-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ac9.bin
1227e0d6aa6cd31b11eb28be21577af2fb76603f7505580246d486eb1af2f637		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AC9 32224 bytes
font_01_sfnt_off00009659.bin
e0b2f5218feb7ccbc61643c87456d5d0b0f9dddc4acedfb65bbbea4baf30e52d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9659 18880 bytes

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