Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc9eaa602d7c0d4…

MALICIOUS

PDF

72.3 KB Created: 2021-03-31 07:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6c30bb4c5a6e7d80d0684c7e011650ff SHA-1: 0951c2b54ebdc9c2675f60649e9babd5a415d69c SHA-256: 9fc9eaa602d7c0d48d4af351666556a6906e04dcd44d354e49dc8417aabf45fc
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm designed to direct users to various PDF documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive external linking suggest it's designed to redirect users to malicious sites.

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://xezojetit.ru/strik?utm_term=how+to+sort+data+in+pivot+table+vba PDF link annotation
    • http://asta-stroy.ru/python_3_basics3krrq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403565/normal_5ff1d46564153.pdfIn PDF document text
    • https://kusijavi.weebly.com/uploads/1/3/4/3/134385668/8719163.pdfIn PDF document text
    • https://latapelubatute.weebly.com/uploads/1/3/5/9/135960370/sopikav.pdfIn PDF document text
    • https://kogababofaf.weebly.com/uploads/1/3/0/9/130969162/kikavozax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392191/normal_6038cbd21c2bf.pdfIn PDF document text
    • http://testvvd.xyz/hachiko_movie_japanese639a9.pdfIn PDF document text
    • https://foluxafan.weebly.com/uploads/1/3/5/3/135397430/624362.pdfIn PDF document text
    • https://tobemokopa.weebly.com/uploads/1/3/0/7/130776516/826011.pdfIn PDF document text
    • https://nolutoxut.weebly.com/uploads/1/3/4/6/134683805/906147.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380528/normal_5ffe3028e3c84.pdfIn PDF document text
    • http://vpntop.info/9450549593vxbkp.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/wupixufekijax/campbell_hausfeld_20_gallon_air_compressor_5hp.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/gisawa.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/maseze.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/kepuro.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/dau_level_2_certification_requirements.pdfIn PDF document text
    • https://f8d82b49-d438-4da2-b906-f876cb6fe635.filesusr.com/ugd/12dc78_218325616a674582821bc49f2ad0058e.pdf?index=trueIn PDF document text
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_34be66016d094dc78fdfba29aecef424.pdf?index=trueIn PDF document text
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_5eafe9261cea4292b451cde3817c30e0.pdf?index=trueIn 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_off0000de12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE12 5204 bytes
SHA-256: 853ac262d40ddef5bee6da6a05337d2db089db319cdfd68843722289dd273a69
font_01_sfnt_off0000efe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE0 10644 bytes
SHA-256: 5106f988f150924a52366480dc296d9c74e25d44a74c6d8f9a4b1613141d4b64

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