Malicious PDF — malware analysis report

Static analysis result for SHA-256 3678d0d1657f930d…

MALICIOUS

PDF

68.3 KB Created: 2021-01-06 00:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e3edfe93896d21babfa7c8698e7e6ec4 SHA-1: b24f187a84f44718a614e8a3432ec923f3c48c27 SHA-256: 3678d0d1657f930dbe75d1db640c12c18fc89fc590001b0b8a51f9da6d5482ed
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect the user to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/123?utm_term=holton+introduction+to+dynamic+meteorology+pdf PDF link annotation
    • https://mofalapew.weebly.com/uploads/1/3/4/3/134307760/kidezubi.pdfIn PDF document text
    • https://jopokiwajisi.weebly.com/uploads/1/3/4/1/134108554/gibogajaf.pdfIn PDF document text
    • https://cdn.sqhk.co/penunotati/SNigiao/whatsapp_business_code_text_scam.pdfIn PDF document text
    • https://selamosufuk.weebly.com/uploads/1/3/4/4/134463567/8770682.pdfIn PDF document text
    • https://siminanora.weebly.com/uploads/1/3/4/6/134611077/2161386.pdfIn PDF document text
    • https://mapawoxerefer.weebly.com/uploads/1/3/4/7/134703144/c7787.pdfIn PDF document text
    • https://fosaxobe.weebly.com/uploads/1/3/4/8/134882536/takoje-gafufamuf.pdfIn PDF document text
    • https://tekadepaja.weebly.com/uploads/1/3/4/3/134341299/zisiremene.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/AAfSwjg/15628594995.pdfIn PDF document text
    • https://bimukata.weebly.com/uploads/1/3/4/5/134598529/risokumane.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/matogapibelifiv/american_football_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/verarex.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/esoms_becc_nko_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/soxukowotomaj/pipokiw.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_off0000ced9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED9 5360 bytes
SHA-256: 6938409c3fae8ef2064a09f625bc15c93068b3b627e820e4219329e792d4542a
font_01_sfnt_off0000e106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE106 10560 bytes
SHA-256: 56b0f4f751b04c01f2d5c90dd25f39b07f865573e630d96cf862cb60ceea38b4

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