Malicious PDF — malware analysis report

Static analysis result for SHA-256 02455d64d3e99da5…

MALICIOUS

PDF

73.0 KB Created: 2020-12-27 13:42:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 84f0da3b2d5d6dee82f89ed93fb2580c SHA-1: e1da0ecebd5a82e69b6e149309c267d08260b732 SHA-256: 02455d64d3e99da567ddaa2a12db760c22e25aed45e30c4c2dddbf0c5c8a084c
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, appears to contain keywords related to a school lunch menu, suggesting a lure for phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further payloads or conducting phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/123?utm_term=new+bedford+public+school+lunch+menu In PDF document text
    • https://cdn.sqhk.co/gisanewat/kCASgjW/jamidakanifevavavenupid.pdfIn PDF document text
    • https://kexexetipo.weebly.com/uploads/1/3/4/8/134897314/cc8d734e5d25167.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/icgijfy/78853944669.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/gelawiweza/un_show_mas_temporada_8.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/bosch_router_circle_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/tawibi.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/23758617749.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/32929590060.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/nodudokepavasefajuju.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/english_textual_concepts.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/vejoziwibasowufiwaloro.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/threshold_frequency_units.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/penyebab_abortus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e63d560d-c4ad-425a-97c0-6e6ebcc32cb0/fetukakelun.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_off0000e2bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BC 5384 bytes
SHA-256: 83e82730c50ca7c8c2862027a7db3a05ff9e7d47386351fdafeeab2109430f40
font_01_sfnt_off0000f4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F9 9900 bytes
SHA-256: 3bc42cabf41f179c7372b35cb1f3eb65315a13e6cef292dbaf47574e6f64e4cd

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