Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ec50533bebcb0b…

MALICIOUS

PDF

71.3 KB Created: 2020-12-31 23:54:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b296469e3b93560ba74e326c4760b3df SHA-1: 7ff38bb6935b2e95e19060e1789ecbaffaeb546d SHA-256: 57ec50533bebcb0b208d621bba4a252a4d23e91d95afb2e385586cc20687eafc
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for a redirector link to 'traffking.ru'. The ML classifier also assigned a high probability of maliciousness. The embedded URL is likely used to lure the user to a phishing site or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffking.ru/123?utm_term=beta+sigma+phi+theme+for+2021 In PDF document text
    • https://cdn.sqhk.co/munemuzabuk/higOlhi/vibuxab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405186/normal_5fe6fbc52b5d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406514/normal_5fad677a064d7.pdfIn PDF document text
    • https://nixozetite.weebly.com/uploads/1/3/0/8/130873825/vagob.pdfIn PDF document text
    • https://kikuvabafot.weebly.com/uploads/1/3/4/3/134332304/gigopevu.pdfIn PDF document text
    • https://zexivuwesime.weebly.com/uploads/1/3/4/3/134356920/1b8e7c9c22dadc.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/pokorevalaxex/permeability_test_of_soil_report.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/nasesuluxetewogalibizel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d733c27-bf29-4977-92ff-baafe5ad8942/ruwabovegupukubusoloxub.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/audio_visual_definition.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_off0000d76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76F 5656 bytes
SHA-256: b2e9ae88f22005245d989a913774fb44f2a82883437683161c760ef5a1ec1aa0
font_01_sfnt_off0000ea8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8B 10692 bytes
SHA-256: 641a49542a3d29436b9482a459c6fb2b80a3133bf54d12e8206616dbbb9d258e

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