Malicious PDF — malware analysis report

Static analysis result for SHA-256 3055d0925cf6bde5…

MALICIOUS

PDF

69.7 KB Created: 2021-01-14 05:42:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3094442e1ef69ca0944abc4936b4b6d3 SHA-1: 9e8490f47467c55f7cc17d294818f390f191e785 SHA-256: 3055d0925cf6bde556b9341e287c0f82beb17deebb0c37c05a339a3ff1e53f53
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are identified as part of a link farm or known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to sheet music, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/aws?utm_term=ludovico+einaudi+giorni+dispari+piano+sheet+music In PDF document text
    • https://puluduzi.weebly.com/uploads/1/3/1/4/131453343/meresugonokik_ruvegas_kilew_suzotuj.pdfIn PDF document text
    • https://gunobodupisar.weebly.com/uploads/1/3/4/6/134677737/mawozozufekeziwi.pdfIn PDF document text
    • https://dujakoxuk.weebly.com/uploads/1/3/1/4/131483447/zuger.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/jbgdigT/woodbridge_crossing_detroit.pdfIn PDF document text
    • https://vegivuben.weebly.com/uploads/1/3/4/6/134660922/181358bfc03c360.pdfIn PDF document text
    • https://tofoboloronu.weebly.com/uploads/1/3/1/6/131636632/2516439.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/vuterijoze/vidigisaveledigisulefo.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/womozumomasixere.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/final_fantasy_6_remake.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/44378919964.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/event_planning_template_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/89988805636.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_off0000d047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD047 5456 bytes
SHA-256: a5b575cb5a3266abfcbae088b7544e342db09c2457007167887dde231af9df8c
font_01_sfnt_off0000e2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BB 11984 bytes
SHA-256: 51bbc0de9b553ee865b3a8e848f4c5072db946f5668b5b1901a4422acd7f95f3

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