Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cbf389d0f400d09…

MALICIOUS

PDF

73.7 KB Created: 2020-11-27 02:49:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2f138d5700c402aa331b126c46907d65 SHA-1: b2afc44b0e1b0ea8f71e6fc87b4decb081585877 SHA-256: 1cbf389d0f400d0941eb95a843a64bc622fd1afd693feed649731e62c118ce84
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result for a popular TV show, likely intended to trick users into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it is designed to redirect the user 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://traffnew.ru/123?utm_term=stranger+things+s3+dvd+release+date PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394082/normal_5fb8fb551bfa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369645/normal_5fa0e3c43cd4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451941/normal_5fbb0305e490c.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/pirosisob/skam_wtfock_season_2_episode_3.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/cell_reproduction_concept_map_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/560c53f0-6f2f-4902-9b19-5444c5da8458/sutixad.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/current_affairs_february_2019_affairs_cloud.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/galikapiwuwita.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/los_angeles_credit_union_loan.pdfIn PDF document text
    • https://s3.amazonaws.com/tipakalif/nuxubusosakajutisoxikirip.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/binocular_vision_assessment.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD27 5412 bytes
SHA-256: fae8545ee2cbaa20e78cf6c0df803ff42eaf0b0771252a8fbfbfdcfb0022a5e4
font_01_sfnt_off0000ef84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF84 1864 bytes
SHA-256: 4de31c7a75fefbdd3368d96489f923eb8ad0539259d850d182381253bb99f8cb
font_02_sfnt_off0000f892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF892 9980 bytes
SHA-256: 95b39334ce7cea2cea4db7119783027be305bbdf8e10c1ac57d62056c56d50a8