Malicious PDF — malware analysis report

Static analysis result for SHA-256 714fd14324f305fe…

MALICIOUS

PDF

33.6 KB Created: 2021-07-03 13:47:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6090fc6adcf7cdb729cc5644a9d34df6 SHA-1: b540eb19a15234347b8bb150992c7e668f54e0fe SHA-256: 714fd14324f305fe1d624dd36255f677d1fa481f640fc92980843fa7e81b98a8
122 Risk Score

Malware Insights

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

This PDF document employs a link farm technique, presenting numerous links to external PDFs hosted on the IP address 103.30.145.97. The document body and extracted URLs suggest a lure for free game items and hacks, likely intended to lead users to malicious content or phishing pages. The ML classifier strongly indicates maliciousness, and the PDF structure itself is flagged for containing a mass of external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/479516143/minecraft-free-unblocked-game-hack
    • http://103.30.145.97/__statics/gudangsoal/files/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/roblox-free-download-ps3_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/easy-robux_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/how-to-hack-roblox-on-mobile_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/how-to-get-the-best-shirts-on-roblox-free_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/free-coins-and-spins-coin-master_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/does-cheat-engine-excute-scripts-into-roblox_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/get-free-spins-for-coin-master_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/free-spins-for-coin-master_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/free-spins-coin-master-links-2021_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/games-similar-to-roblox-free_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/minecraft-bedrock-free-with-java_GM479516143.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/how-can-you-get-free-robux_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/free-accounts-on-roblox-discord_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/can-a-developer-give-free-gamepasses-roblox_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/how-to-get-free-robux-with-no-verification_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/how-do-you-get-free-roblox-money_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/22-500-robux-free-2021_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f57.bin
27e39ff169514c4145b12947c80a3e8e83a4102d38e10771cbc0ffac020cf569
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F57 21876 bytes
font_01_sfnt_off00005f4e.bin
895a36f5a5f90913cb79adc07e2b796c0bdee1bc761bccd5f30adeaa4bf49632
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4E 18760 bytes