Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a1dc42aa2f6153…

MALICIOUS

PDF

34.5 KB Created: 2021-06-24 05:53:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 68af19c5a81dc451878ae6e96bc95e09 SHA-1: 6aa55ab428aad16c6ac067542f972bfe02d2f483 SHA-256: 70a1dc42aa2f6153fcee4fea627e0c2e46eba30d6d81f67e1c03de231ebcc6e1
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs that link to websites offering "hacks" and "free" in-game currency for popular games. The heuristic firings indicate a PDF link farm and a high ML score for maliciousness. The document's content and structure suggest it is designed to trick users into visiting these sites, likely leading to malware downloads or further phishing attempts.

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.co/app/406889139/coin-master-hack-spins-free-game-hack
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-coins-for-coin-master_GM406889139.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-roblox-cards-pin-number_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/cute-free-stuff-on-roblox_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-robux-hack-generator_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/coin-master-instagram-free-spins_GM406889139.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-apk-mods-coin-master_GM406889139.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/get-me-robux-for-free_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/robux-only_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-robux-giveaway-live_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-many-levels-does-coin-master-have_GM406889139.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-robux-no-survey_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/original-roblox_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-coin-link-for-coin-master_GM406889139.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/websites-for-robux_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-money_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-hack-someones-account-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003267.bin
aa67c6a51a9e89a5beb8f5c3924be310c428c4253df208ea83c64998a079edcb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3267 22272 bytes
font_01_sfnt_off000063fa.bin
4c1a6a856cca30975d4ab172116193564d8bcac3dcd41784e924849fb164ed8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63FA 18344 bytes

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