Malicious PDF — malware analysis report

Static analysis result for SHA-256 c71104349f9a955f…

MALICIOUS

PDF

68.6 KB Created: 2020-12-09 11:33:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 929d40e27fb8b605f23d265990005672 SHA-1: 1dd63df2d69ade955aae5aba6ac2c7ca67c5c22c SHA-256: c71104349f9a955f8a39a61a3f38c355dee3b98274f8fa4e71a1565b43473e6b
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of embedded links, with one identified as a known malicious redirector. This strongly suggests the document is designed to lure users to malicious websites, likely for phishing or scam purposes. The presence of a link farm further supports this, indicating an attempt to distribute malicious content widely. No scripts were extracted, but the PDF structure itself is the vector for the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7649

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://gettraff.ru/aws?utm_term=aplikasi+al+quran+indonesia+versi+lama
    • https://vizodifoberesin.weebly.com/uploads/1/3/4/9/134900429/f0c0f02.pdf
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/39e33fc5e02.pdf
    • https://batagokefo.weebly.com/uploads/1/3/1/0/131070859/1022732.pdf
    • https://nowusunomotir.weebly.com/uploads/1/3/4/3/134314498/geritajivojeviw.pdf
    • https://wudigunufite.weebly.com/uploads/1/3/4/6/134611509/nitawewutusowerenaj.pdf
    • https://piguvedulo.weebly.com/uploads/1/3/4/7/134724556/237e957.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc149602bbd740658092695/t/5fcd07b37ae85b53b295f1cc/1607272372526/15378053848.pdf
    • https://static1.squarespace.com/static/5fc4d0d3a3bf4b14abc221fa/t/5fc5859cf3de5e49b521f055/1606780317134/backgammon_pieces_for_sale.pdf
    • https://static1.squarespace.com/static/5fc59785d49dd12447543100/t/5fd01f686cbf29106bf10122/1607475048851/pukiwasapejugesemaxolex.pdf
    • https://s3.amazonaws.com/susonanezaj/losil.pdf
    • https://uploads.strikinglycdn.com/files/bc7b47f2-6695-4151-8352-ddad9f88f6eb/dikekexojobu.pdf
    • https://s3.amazonaws.com/tuzamada/xirenidutukodazeneb.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4c86f8cdb769c6d9096d/1606372486743/33539236141.pdf
    • https://static1.squarespace.com/static/5fc79f4904a8c57c148b6805/t/5fcef3e8509e863c682485a8/1607398376654/windows_xp_file_manager_privilege_escalation.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3bf.bin
c07122774f79da88a632c80e61a7350778abcde0f879b79ea1f018deba8a857f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BF 5344 bytes
font_01_sfnt_off0000e5cf.bin
89480e85b2c670f5dcdc8af47a6a6e139f92ef26e595578fb0144b214f9ca7ac
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CF 5204 bytes