Malicious PDF — malware analysis report

Static analysis result for SHA-256 d82e79b56f2e533a…

MALICIOUS

PDF

65.6 KB Authoring application: Soda PDF
MD5: 1aff7c630e6ec9b46aac30534a73cf25 SHA-1: 2fef6a3029ae00f7aaefa0b413662fee370e81c4 SHA-256: d82e79b56f2e533ab58d6d22bd80774ed0c18f8d25e533fecf9b6bca0e56f110
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm designed to direct users to potentially malicious content, such as phishing pages or malware downloads. The ClamAV detection and ML classifier strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://whitbyschoolofmusic.com/uploads/1/3/0/5/130588579/1574613.pdf
    • http://661junkhauling.com/uploads/1/3/0/4/130494289/fijaso.pdf
    • http://adaircctv.com/uploads/1/3/0/5/130539800/liliteb_sarenugipug.pdf
    • http://gadgets-kings.com/uploads/1/3/0/5/130539099/90eeedeb438ac.pdf
    • http://thanksvember.com/uploads/1/3/0/7/130775506/fubisejofitij.pdf
    • http://playerpimphustler.com/uploads/1/3/0/7/130740427/dowew_sugofafa_pupivilaladu.pdf
    • http://imagecathedral.net/uploads/1/3/0/7/130776460/7940177.pdf
    • http://theyarn.shop/uploads/1/3/0/3/130379336/tajatakenotutum_befebajodexi.pdf
    • http://thinkglobaly.com/uploads/1/3/0/2/130289385/juzefiwekaj.pdf
    • http://telukaz.travelsam.ru/uploads/2020/01/29/bamilenelonagelubo.pdf
    • http://walifedot.tourmalin73.ru/uploads/2020/01/28/muvejuzefe.pdf
    • http://hugwear.net/uploads/1/3/0/4/130435982/xizug_bofukigefuvalot.pdf
    • http://davidmarquesibanez.com/uploads/1/3/0/7/130775429/130775429.html#mandarin+chinese+pinyin+dictionary

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001543.bin
f066f7de5f4b13a65373ff4a38c6ec6e257284b1ab52bf1771f298bcd2851b22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1543 9964 bytes
font_01_sfnt_off00006d83.bin
bd042b881ca83b47c5f7e5cf3a4eb8131222bbadbd29890c78c27b613bf10377		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D83 16520 bytes
font_02_sfnt_off00008598.bin
2c700a5831c2a200037ac04c75d4a080900964164e2b020d103f2acb0a78aa27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8598 24596 bytes

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