Malicious PDF — malware analysis report

Static analysis result for SHA-256 43ae9bd2ee13ec38…

MALICIOUS

PDF

36.0 KB Created: 2021-07-08 17:16:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 404eeca2b1c74de6ecca7763f4e780e3 SHA-1: b1be6b9e4e70e71319dfc5ad0f55a740e49dc916 SHA-256: 43ae9bd2ee13ec3802517891c6467cf512ffd3359af5304d90397f0ae24b0f28
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was generated by wkhtmltopdf and contains numerous embedded links, many of which point to pages advertising hacks for popular games. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests a deceptive SEO tactic to drive traffic to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

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/406889139/coin-master-hack-2021-no-survey-game-hack
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/hack-coin-master-no-verification_GM406889139.pdf
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/free-robux-promo-code-generator-2021_GM431946152.pdf
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/how-do-we-get-free-robux_GM431946152.pdf
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/how-to-get-free-food-on-coin-master_GM406889139.pdf
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-cards_GM406889139.pdf
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/roblox-rewards_GM431946152.pdf
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack-2021-no-scam_GM431946152.pdf
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-hack-app_GM406889139.pdf
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/how-to-hack-people-on-roblox_GM431946152.pdf
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/free-robux-admin-code_GM431946152.pdf
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/robloox-hack-como-tener-robux-gratis-decienbre-2021_GM431946152.pdf
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-free-coins_GM406889139.pdf
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-new_GM406889139.pdf
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/apps-to-get-minecraft-for-free_GM479516143.pdf
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/hack-coin-master-nyc_GM406889139.pdf
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/mcpe-hacks_GM479516143.pdf
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/robux-earning-sites_GM431946152.pdf
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/www-robux-redeem_GM431946152.pdf
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-hack-pc_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000033db.bin
80e16fc1f4832596d498527f6d0ed60aa6394183a501761c5fc41441a87330e2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33DB 23220 bytes
font_01_sfnt_off00006832.bin
1325f19f56b1902aee1bd04bf166c144e5e001d01594981a3207023f6b385a01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6832 18840 bytes

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