Malicious PDF — malware analysis report

Static analysis result for SHA-256 648503f8da91908a…

MALICIOUS

PDF

76.7 KB Created: 2021-02-26 00:53:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 4fc361ba6ec3ba03919ee910d7250ec8 SHA-1: 9742bee57bd68a2b4ba1281f88592d3ba10c2ce8 SHA-256: 648503f8da91908a95c3b6c62a549855d1e2c3c83403ba7f5f9380304916d14c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL leading to a domain associated with malicious activity. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded links suggests an attempt to redirect users to potentially harmful 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://jottigo.ru/123?utm_term=diary+of+wimpy+kid+rodrick+rules+movie+google+drive PDF link annotation
    • https://varemajog.weebly.com/uploads/1/3/4/5/134585454/sewubiw-xotonuzuburobif-wixufemet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420747/normal_5ffa6236e0aaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462038/normal_6028935988054.pdfIn PDF document text
    • http://shoplus.info/94104995374fbnwu.pdfIn PDF document text
    • http://taher-tcac.com/kumabedebuvem2ixn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379964/normal_5fe4b16e08c4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380393/normal_5fe5915221408.pdfIn PDF document text
    • https://zuvofuguwapu.weebly.com/uploads/1/3/4/0/134042474/kifedi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409806/normal_5fe17e5f2b5d4.pdfIn PDF document text
    • http://itash.space/inventory_valuation_report_in_sap_b1byba9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499636/normal_60191545e8147.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465010/normal_5ff1f92cbfcc5.pdfIn PDF document text
    • http://importants.space/equation_of_a_line_examples_and_answers4bsfw.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/ninasivol/free_printable_residential_lease_agreement_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/27262769873.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/bixby_voice_apk_for_pie.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/vewokijole.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_off0000e42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42D 5792 bytes
SHA-256: 1d1583303c9eb826ceae310af94ce638b7482ec14a24fabcd34b35f9bc4fcadb
font_01_sfnt_off0000f806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF806 14224 bytes
SHA-256: c221f3bc3807ef22ad9da249c42d35aaf5ef4eed1974329dba8bcbab3115b03b

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