Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef8ab3904f5f47c…

MALICIOUS

PDF

66.9 KB Created: 2020-12-01 12:26:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d4187bf2537e444d9957069ee91af48e SHA-1: 7fe97ff209143384bca72258e49b352a0e517947 SHA-256: 3ef8ab3904f5f47ce8622270e14b342c7e9a09341e22104a663b34274c602d47
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit users by directing them to a malicious site.

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://trafftec.ru/strik?utm_term=rockwell+bladerunner+x2+blades PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386334/normal_5f9200e7e3248.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426814/normal_5fb9651ccffd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375199/normal_5f8a85f74557f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496810/normal_5fc5c9d848992.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_5f8900edeebe3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414486/normal_5fadf1eb87974.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f9a0a32ba7d3.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/rawesaragegugar/irregular_polygon_worksheets.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0406b474932ca2689901/1606222855210/wash_by_william_faulkner_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/37962407564.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d9cdc14dfd36fe0adb20/t/5fc56785eaf37e3b645297e7/1606772613871/rukasomifejosezetojofoda.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e6b83dfdd95b60d5131d/t/5fc1a50b3f75b16643125571/1606526221320/lg_stylo_4_stylus_pen_replacement.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ebd09955c744b53ba8af/t/5fc45ef961e25426e1c3ea33/1606704889986/gutuvefirasaganamurex.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c9b1a5bc066edfa528b7/t/5fc3ac083485235c86370f57/1606659080409/52551004139.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_off0000c8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D0 5436 bytes
SHA-256: bcd97b597827c48962361191c58488c1afc153849df9600abc9bd30aa48e02db
font_01_sfnt_off0000db75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB75 10324 bytes
SHA-256: 6d3b9cc723a9e2339cfabeadb1123f407fa5c89a47fbb4848b822f4d03cb60f1

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