Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc450ff25a1125a…

MALICIOUS

PDF

66.0 KB Created: 2020-12-03 15:40:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cf245ab1533542eb8bb4c4a10e6b277a SHA-1: 6fb08b785d5dc4159efc84aeeeb5d896d000f5ba SHA-256: edc450ff25a1125a5d63851b5bfa81a39d64077bcb34149b0e2df2825d788d30
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI are sufficient to infer a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=nursing+care+plan+for+liver+abscess PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369313/normal_5fbd4fd752b4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385010/normal_5fb2bda1ee791.pdfIn PDF document text
    • https://fetepidema.weebly.com/uploads/1/3/4/6/134684810/4914056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379849/normal_5fac3e8952236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386347/normal_5f98dd0620255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385853/normal_5f9eb0b0ee4ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2b72bbd740658066ec4/t/5fc15e313c6ccf69f3913967/1606508081838/jcpenney_stores_in_massachusetts.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55556bdb33045eedfa18c/t/5fc6cb0e09f4d56e8f70c548/1606863632699/ffxv_guide_ign.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf23a79c08c7f2b9dc110/1606218300957/muforal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4f2bf3de5e49b55ac006/1606373163951/tatopug.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/smartsheet_engage_2019_cost.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf35072f8b574a0f275d8/1606218577275/curved_text_in_powerpoint_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/jikeribekenodudubujugol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c87788c99b6d37a67a80/t/5fc14919f8cdb769c612e7a4/1606502682376/pisuzelawulikewisu.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_off0000c69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC69F 5352 bytes
SHA-256: 3f0b3e68b1b995ff9f7431ce1d02f825b29b42cbda632fceb9737edbf351fb7b
font_01_sfnt_off0000d8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F3 10020 bytes
SHA-256: cdd1e3416c13631f08b5365d0e25f2b65095a4b71a490c2e530cacd9444f5c43

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