Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7e7b87d908ae54…

MALICIOUS

PDF

71.8 KB Created: 2020-12-04 05:30:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a48a6e1278e38a71c4a0a5176d631aa SHA-1: be3edebaf36eeb90c2bc344efd0d7c6a204aace2 SHA-256: 7a7e7b87d908ae5451c5f0e1031648b3720cd9587296df02cdfe21da2fdade1d
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, traffnew.ru. While no scripts were explicitly extracted, the PDF structure and the presence of an external URI suggest an attempt to redirect the user to a malicious site, likely for phishing or to download further malware.

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://traffnew.ru/123?utm_term=a+love+to+last+may+18
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tulosa/49448761433.pdf
    • https://s3.amazonaws.com/lanowilovuviwib/witajaved.pdf
    • https://s3.amazonaws.com/fosagoba/ans_phone_setup.pdf
    • https://s3.amazonaws.com/pewebopufupe/babuberademelo.pdf
    • https://s3.amazonaws.com/kisimujuk/xumirozomifibelalan.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf4bc18e72e5fdb9c3ae6/1606284481832/41140248973.pdf
    • https://uploads.strikinglycdn.com/files/2c81f9e0-1ee1-4bd2-ab7e-c746706c0609/dachshund_colors_akc.pdf
    • https://s3.amazonaws.com/sodoxi/penawamirereger.pdf
    • https://s3.amazonaws.com/besafefaf/walefexikuwidobezorifaw.pdf
    • https://s3.amazonaws.com/zinudipir/manual_bioconstruo.pdf
    • https://uploads.strikinglycdn.com/files/b5097155-f6da-4e2a-a7d7-1a06da2b546a/89135055461.pdf
    • https://static1.squarespace.com/static/5fc3c655d26ff1194f85c811/t/5fc4e962e6d49a06bb2cb3e0/1606740323162/english_corpus_online_free.pdf
    • https://static1.squarespace.com/static/5fc0c66b27a199023ab4af32/t/5fc97a4f80956a0b84bc16ca/1607039569220/30071067932.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_off0000dbed.bin
34ca3a371a68be4b5cebfd85bb6522b9541f5ad5700b463d8791a9ca6de6afac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBED 5132 bytes
font_01_sfnt_off0000ed6a.bin
9e5f6f7cb36f379a7a0f93cab6245303eecb495ec9b171aebabdad2d37ac162a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED6A 11224 bytes

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