Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae951eb40359bde…

MALICIOUS

PDF

75.9 KB Created: 2020-12-30 07:51:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b02f784e6e5e0e81e609d7a5c294d42c SHA-1: 764b72e1b967b7a9fd9cab74a9c498f84191c00f SHA-256: cae951eb40359bded84fdb8a97ec9fb6b0327b305f27e6f3fc03a124f9115230
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the presence of numerous external URIs suggests the PDF is designed to redirect the user to malicious content.

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
  • 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.
  • 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://trafffi.ru/123?utm_term=angels+seating+chart+interactive PDF link annotation
    • https://cdn.sqhk.co/nezafomura/WieP6Su/tiny_little_racing_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvutose/H9jgIhj/raid_shadow_legends_characters_list.pdfIn PDF document text
    • https://nikitepiwaligu.weebly.com/uploads/1/3/4/6/134647260/830d78ea6223ef3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379973/normal_5f8ba88bc3425.pdfIn PDF document text
    • https://sivagodumojuji.weebly.com/uploads/1/3/4/2/134235915/banekiririgu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_5f8ed8ae9c618.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/jaxLoji/movedigojopod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403684/normal_5f9565af766fb.pdfIn PDF document text
    • https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/tawijeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389792/normal_5fcbe523900e9.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/lurutopobi/56845815920.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/pizadijesivotatobejo.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/boarding_pass_jetblue.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/lekexozipijupe.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_off0000ec47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC47 5112 bytes
SHA-256: da9b30c6abf2c5da9a13bb6c80d781825d2c23d8d2326e85d17c3543cd087595
font_01_sfnt_off0000fdae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAE 10820 bytes
SHA-256: 227bf9ebf1b6aadb489e969aa3aff2e245b746135797ecdc6ab61c3dbcfc8698

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