Malicious PDF — malware analysis report

Static analysis result for SHA-256 aade06167a6424a1…

MALICIOUS

PDF

672.5 KB Created: 2021-04-16 10:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 99dc272fac25e8f81ccb5f89f6d0759b SHA-1: c51987d4b3dc553e6571824325722cb6968c42cd SHA-256: aade06167a6424a112df49b71d773700f74e34ae6ad452dcfc287d75ead0692f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated maliciousness. It contains multiple embedded URLs, suggesting a phishing or redirection attempt. While no scripts were explicitly extracted, the presence of embedded URIs and the overall detection profile point towards a malicious document designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7738

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://www.pacificsportfraservalley.com/sites/default/files/webform/banofamuwidobekoke.pdf In PDF document text
    • http://seiary.com/sites/default/files/webform/rec/6045441545.pdfIn PDF document text
    • http://spotlight-sites.com/sites/default/files/webform/loboje.pdfIn PDF document text
    • http://cicatsalud.com/html/sites/default/files/webform/dozigax.pdfIn PDF document text
    • https://www.ofalloncasting.com/sites/default/files/webform/gegemapoxazokex.pdfIn PDF document text
    • http://oaklandchildcare.org/sites/default/files/webform/71502920023.pdfIn PDF document text
    • http://www.muttypawsacademy.com/sites/default/files/webform/vaccines/lozege.pdfIn PDF document text
    • https://www.natsihwa.org.au/sites/default/files/webform/xexazud.pdfIn PDF document text
    • https://ambrose.edu/sites/default/files/webform/nakevatekiviva.pdfIn PDF document text
    • https://www.mothercare.ro/sites/default/files/webform/resumes/tawapiseligimagawawujimo.pdfIn PDF document text
    • https://ambrose.edu/sites/default/files/webform/26147793628.pdfIn PDF document text
    • https://vectorcorp.net/sites/default/files/webform/resume/dofivefodazewinewes.pdfIn PDF document text
    • https://www.uts.cw/sites/default/files/webform/suvexaxobufakup.pdfIn PDF document text
    • https://architecturaldesigninc.com/sites/default/files/36110977311.pdfIn PDF document text
    • https://www.termis.org/system/files/webform/manejuwavujegajejumoxak.pdfIn PDF document text
    • https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/22559513310.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=chilam+balam+hope+arPDF link annotation
    • https://drones.princeton.edu/system/files/webform/61493424170.pdfIn PDF document text
    • https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/1901815882.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_off000a33b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA33B3 4928 bytes
SHA-256: 3f585ad20682fe4a7bfa6d4bf2391aac973280e11862d67420f37c4f31bcd5cd
font_01_sfnt_off000a4448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4448 14420 bytes
SHA-256: 0e5ceb08367a7788126d3bc745f1520737ec9183331afd165ad023a8d24bd9fd

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