Malicious PDF — malware analysis report

Static analysis result for SHA-256 effad629a2b2e220…

MALICIOUS

PDF

69.6 KB Created: 2020-11-17 17:50:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: bfff12d5dae5783181624fb67b75f7e4 SHA-1: ed205d548915f77a3efb6a1703aa179687a3acac SHA-256: effad629a2b2e220bd6e0e5ea78b9653bd6d3abe182f82389dbc18b19547666f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, with a significant number pointing to Weebly-hosted PDFs, suggesting a link farm or content distribution network for malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/strik?utm_term=toyota+jit+case+study+pdf PDF link annotation
    • https://gijepeparo.weebly.com/uploads/1/3/4/3/134318767/mubeje.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/fifolaketobufa-digopogoxen-jimamawamuge.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/13d71d437be.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/2107864.pdfIn PDF document text
    • https://daxuregivav.weebly.com/uploads/1/3/4/4/134431970/a69976de5f.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/turip/grammar_worksheets_for_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/intrusion_alarm_system_honeywell.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/nibamagipaxojapadag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99cf2096-b231-4896-a90d-c5d60cf56960/remington_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/23326701822.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/10203782901.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/93178876157.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/what_did_android_17_wish_for.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a664e4d-0192-4801-a4f3-79dd7f76f716/xerowusebepepevuke.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_off0000cc34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC34 5148 bytes
SHA-256: c54283331f5089051fda6665255d68e3c11e04f81ec4c1bc395feee604372b5c
font_01_sfnt_off0000ddde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDE 14060 bytes
SHA-256: 2896f0bcfa905e6b906d9a8c315ca47cb443e31e250c05def425766c306c9c05

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