Malicious PDF — malware analysis report

Static analysis result for SHA-256 55cca82a5ca04e1f…

MALICIOUS

PDF

78.9 KB Created: 2021-05-18 13:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 478daf1175a9184c7d6c891f4f6adbe0 SHA-1: f6c0b6cf526fb56cab0d3fef609710aab13ecb68 SHA-256: 55cca82a5ca04e1f42dbf9b334c7d8375efe7ade62638619f4eee2734693cac2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of malicious activity, potentially leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/strik?utm_term=formula+para+hallar+el+volumen+de+un+prisma+rectangular PDF link annotation
    • https://kegewibenufugix.weebly.com/uploads/1/3/2/6/132682471/5446528.pdfIn PDF document text
    • https://tozadifoxu.weebly.com/uploads/1/3/4/9/134904498/gawepuje.pdfIn PDF document text
    • https://fumunavizagoz.weebly.com/uploads/1/3/4/2/134235019/260e5.pdfIn PDF document text
    • https://kuduvoga.weebly.com/uploads/1/3/4/7/134745106/mafova_fonekadimi.pdfIn PDF document text
    • https://vidatizotasajad.weebly.com/uploads/1/3/4/0/134017381/marugonel-dedik-najogez.pdfIn PDF document text
    • https://vobokalonumenu.weebly.com/uploads/1/3/4/6/134656332/1044576.pdfIn PDF document text
    • https://julubagarod.weebly.com/uploads/1/3/2/6/132695517/xupabewiretiwe.pdfIn PDF document text
    • http://zabunugakope.22web.org/38953073639.pdfIn PDF document text
    • https://zigudufojivop.weebly.com/uploads/1/3/4/7/134718002/4344265.pdfIn PDF document text
    • http://zetomanebegox.iblogger.org/zodugoweso.pdfIn PDF document text
    • https://zevuvizaxetu.weebly.com/uploads/1/3/4/8/134887967/gajav.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/zetubakuz/gadenomu.pdfIn PDF document text
    • http://pozujig.epizy.com/35756322746.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/acrobat_reader_pro_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/workshop_practice_series_43.pdfIn PDF document text
    • http://fenulujexita.epizy.com/bose_tws_k2_review.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/how_much_does_a_mercury_9.9_2_stroke_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/wekapidolunavipiriwip.pdfIn PDF document text
    • http://lexireto.epizy.com/kekalamafasaganetovotu.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/developing_intuition_books.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/multiplication_and_division_word_problems_3rd_grade_common_core_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/7227373767.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/calendar_format_photoshop.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA16 5500 bytes
SHA-256: 8b0a8180b2d6ece8446704ca70b8041085be7f83923878a8546ae7d187c59f48
font_01_sfnt_off0000fca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA0 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0001052e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052E 11800 bytes
SHA-256: 958697886c6af0d93a5126bce5ae449d8b1dc7c828c6edfa78d233ead2f78c6f

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