Malicious PDF — malware analysis report

Static analysis result for SHA-256 df352e5fad2abf06…

MALICIOUS

PDF

68.8 KB Created: 2020-11-23 06:36:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b74bfe0900dee03788eefab69523b07f SHA-1: 36f076cd64da14ae56f3c86b99e297e08b58862a SHA-256: df352e5fad2abf065ed1d70b50412ef5f8a06193a30f983052ce5ced8ea031cc
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to 'Symantec ghost bootable cd iso' and an external URL, suggesting a phishing or social engineering lure. The presence of embedded URLs and the overall detection score point towards a phishing attack leveraging a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/aws?utm_term=symantec+ghost+bootable+cd+iso PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f90897dbbe1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419412/normal_5fb48ba2044dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f871e2abd548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f8956e79f421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f87c4a43afd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381085/normal_5f8e8d87159bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8d849fc5be2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380213/normal_5f9f195df18ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_5f9c339641db8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386834/normal_5f9447737d32f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456114/normal_5fad9d9c93295.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393489/normal_5f90a493884a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369774/normal_5f8de26e43549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484999/normal_5fa991f2d5a68.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/n_r_e_p_ka_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/eat_what_you_watch.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB7 5604 bytes
SHA-256: 015711c4723c6205905463fb6fab2c724636f553536f9b57d3cea768d8240b25
font_01_sfnt_off0000dfa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA1 11088 bytes
SHA-256: 474803fd7326d0cd50810e092ac15a69bedcdbb8ac72c5fe355cd4e99e528b66

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