Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbe2ad7e0ec1cae…

MALICIOUS

PDF

75.4 KB Created: 2020-12-25 09:20:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6964f2038a227f356236a733cffe833c SHA-1: eef541bfcfdadff60c0084a9bc338fbd5eee2982 SHA-256: fcbe2ad7e0ec1caeaa3c31d4c0d95923b6250a2d3c39c7a8ead4b9a5dc19c2e7
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a phishing or malware distribution attempt. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/strik?utm_term=vex+3+game+center In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f8a506000ef5.pdfIn PDF document text
    • https://fomomeku.weebly.com/uploads/1/3/2/7/132712435/kuzubep-futujufi-tebesotake.pdfIn PDF document text
    • https://guxesawaxogego.weebly.com/uploads/1/3/4/3/134314991/putererekolo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_5fb34727465b7.pdfIn PDF document text
    • https://kefelewupu.weebly.com/uploads/1/3/4/7/134711224/7353587.pdfIn PDF document text
    • https://jalaxogazumin.weebly.com/uploads/1/3/4/3/134373329/1dcb8e.pdfIn PDF document text
    • https://zififawatef.weebly.com/uploads/1/3/4/3/134384507/ravunori.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9302a0eb-c453-4e45-91f9-b10bfc314a49/49751681462.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/befikra_tiger_shroff_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/detective_pikachu_online_free_fmovies.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/unwritten_natasha_bedingfield_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/ebook_the_norton_field_guide_to_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/arpeggios_piano_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f28863d3-e041-4264-b56d-520360f6f4cb/ora-12154_tns_error.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/40053919604.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_off0000eb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB06 5104 bytes
SHA-256: d26b554372435feb413afbbfbf640e3ea43cac03dcec97aca5bf4dc096b70f20
font_01_sfnt_off0000fc5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5F 10644 bytes
SHA-256: 6eebf4dcfd9e880d2fc52f1195915a45c4e4b5bb0313225374e55a6c8427191c

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