Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48ada0478616a55…

MALICIOUS

PDF

59.6 KB Created: 2020-11-14 05:15:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51c97fde7a2cad3c4ca1726ce358efa1 SHA-1: 5b8b2c73f6019314824bd131115ab7dd1be61dd2 SHA-256: c48ada0478616a55168c050c0e62a4fefdf1e9649134ceaf18eac88adfb950b2
154 Risk Score

Malware Insights

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

This PDF file contains numerous external links, a common technique for SEO poisoning and phishing. The primary URL, trafffe.ru, is suspicious and likely leads to a malicious site. The PDF also contains embedded JavaScript, which could be used to further obfuscate the malicious intent or redirect the user. The ML classifier and ClamAV detection strongly indicate maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://trafffe.ru/strik?utm_term=southern+highland+news+death+notices
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/fogatifekil_rajokotewepifo_ridujikuge_pemovagaj.pdf
    • https://cdn-cms.f-static.net/uploads/4410730/normal_5fa351dacc1a6.pdf
    • https://cdn-cms.f-static.net/uploads/4424376/normal_5fabad0fcad34.pdf
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f86fb1e8dfd4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sorapobuk/socomec_atys_d20_manual.pdf
    • https://uploads.strikinglycdn.com/files/f51d3dd5-b4fd-4133-9712-4d6a5dccd313/property_tax_records_for_davidson_county_nc.pdf
    • https://uploads.strikinglycdn.com/files/37a76a8c-4401-41c0-92e2-5ef179045465/98217321690.pdf
    • https://s3.amazonaws.com/foneniz/64188463137.pdf
    • https://uploads.strikinglycdn.com/files/603d845e-72d6-4521-9a0d-00db71474044/optical_isomerism_of_tartaric_acid_p.pdf
    • https://s3.amazonaws.com/wolina/employee_attendance_record_printable_form.pdf
    • https://s3.amazonaws.com/wusigipufuvowix/berlitz_english_placement_test.pdf
    • https://s3.amazonaws.com/jumedemimo/lixozodasuvise.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b777.bin
b1744f0c97113884b02081b88520e3e7a94f4360e3bde1f4555a4631754bc4e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB777 5396 bytes
font_01_sfnt_off0000c9d9.bin
73c7786486d9af292cec82b4da05ae7c55f613a53182ff2b4472db3bf2efa68f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D9 11144 bytes

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