Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b84fa0393679ec4…

MALICIOUS

PDF

42.6 KB Created: 2021-05-17 19:33:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6b9fb6b2ebed0ab08c10f638845c1ec2 SHA-1: 3ba049a2c27b688835d667df4180296f64f5a1d1 SHA-256: 1b84fa0393679ec4d9bac3b69fda70f341f76746438050b365ff5240920981b2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on a domain associated with SEO spam and link farms. The document body and extracted URLs suggest a lure for game-related hacks and free currency, likely directing users to malicious sites. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-jackpot-madness-hack-game-hack
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link-2021-today_GM406889139.pdf
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-trading-group_GM406889139.pdf
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/how-to-earn-free-robux_GM431946152.pdf
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/hack-coin-master-ios_GM406889139.pdf
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-spins-today_GM406889139.pdf
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link_GM406889139.pdf
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/free-coins-app-for-coin-master_GM406889139.pdf
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/robux-place-rewards_GM431946152.pdf
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/how-to-add-mods-to-minecraft-pe_GM479516143.pdf
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/coin-master-hack-free-spins_GM406889139.pdf
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links_GM406889139.pdf
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/coin-master-game-hacking-tricks_GM406889139.pdf
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/gamesofficenet-hack-coin-master_GM406889139.pdf
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/minecraft-hack-2021_GM479516143.pdf
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/minecraft-java-edition-for-free_GM479516143.pdf
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/free-minecraft-servers-to-join_GM479516143.pdf
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021_GM406889139.pdf
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/300-free-spins-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ad4.bin
26923f6c1fcea3fef615784a63f4ddf114657824830fbd0b04112829edacd4ec		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AD4 25336 bytes
font_01_sfnt_off00008434.bin
7e7ffe0925f069372f8aec15272312b752d771f30cadb28f8d6f8a4187954caf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8434 18232 bytes

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