Malicious PDF — malware analysis report

Static analysis result for SHA-256 728b7bacee5f55df…

MALICIOUS

PDF

63.0 KB Created: 2020-11-18 18:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c98efcc17a8de71da971fa4980480ddb SHA-1: d58578da45cd6de4996004b8d866dd72ac31cf78 SHA-256: 728b7bacee5f55dff9d2b524a5e57efbc7258031624ec8e5dd89817ae630d25e
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'trafffi.ru', which is likely a phishing or malware distribution site. The presence of multiple Weebly-hosted PDF URLs further suggests a campaign distributing malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://trafffi.ru/strik?utm_term=letra+y+acordes+de+la+cancion+ni%25C3%25B1a+que+nacio+limpia+de+pecado
    • https://fevuleniwawe.weebly.com/uploads/1/3/4/4/134476097/6281784.pdf
    • https://rujovisaz.weebly.com/uploads/1/3/4/3/134328318/4376984.pdf
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5f8a514b485ad.pdf
    • https://dajexave.weebly.com/uploads/1/3/4/3/134352807/5ef03f620.pdf
    • https://vabebixeteguju.weebly.com/uploads/1/3/4/2/134234611/3259fa9f8321b.pdf
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5f931eeeb28a3.pdf
    • https://cdn-cms.f-static.net/uploads/4461250/normal_5fb01d50e90a5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lejivugeleguwod/zizuj.pdf
    • https://uploads.strikinglycdn.com/files/47c4a9f0-4726-4fd2-a1d1-f45122af9d82/panasonic_lumix_dmc_zs10_reviews.pdf
    • https://uploads.strikinglycdn.com/files/9c9b7e3c-7aac-4afa-9538-0cadbc238b0f/gcss-army_driver_s_license.pdf
    • https://uploads.strikinglycdn.com/files/03a79480-1bdd-4f8f-b654-49bb9e4fa090/wogarijelidola.pdf
    • https://uploads.strikinglycdn.com/files/2135b813-cb04-47f7-9613-e21ce39fbaae/67536777846.pdf
    • https://uploads.strikinglycdn.com/files/555ac9b6-775b-4ee3-b6e8-759c6c5b72d6/bubozukowo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b31f.bin
f558e78c47a878865b80ced83a86b47f20b45faad49183099150febb94da3960		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB31F 5600 bytes
font_01_sfnt_off0000c5d7.bin
2f18cdb81a33fefcddc6a07ab06dcc2ae256f536822e3e74c29c93aedbbd5097		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D7 11900 bytes

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