Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a9d012d5a5046dd…

MALICIOUS

PDF

73.8 KB Created: 2021-02-16 10:48:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2fd0a2b1ba72ff621224661c478c5e6f SHA-1: b7407961c4cd698f0a83f491ca66bed10d60ff95 SHA-256: 9a9d012d5a5046dde4a060626dc044daa823be4d4e979d32c7cc68008c80f585
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=rheem+rbha-17+specs PDF link annotation
    • http://vclean-sale.shop/symmetry_worksheets_free_printablei3gc1.pdfIn PDF document text
    • http://helper-badges.com/ghost_boys_charactersza9tw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411935/normal_5fc852cc9256a.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/65920108610ath7x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445736/normal_6007ba5d56298.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454821/normal_6007e0acb1dfb.pdfIn PDF document text
    • http://bio-ita.fun/what_are_the_main_ideas_of_humanistic_personality_theorywdjkv.pdfIn PDF document text
    • https://nopeludaseji.weebly.com/uploads/1/3/3/9/133986928/nubatabel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390371/normal_601e642c6ca40.pdfIn PDF document text
    • http://pasendapp.online/971497327221sqhb.pdfIn PDF document text
    • http://save50it.pro/25661254251fg7fs.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/ropidadegaxut/resume_template_online_free_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/vuniridinesinos.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/auditor_general_report_2016_zimbabwe.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/xekaj.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_off0000e10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10C 5452 bytes
SHA-256: d5ab1f09a76a5304a92c7814dca99e55430002a9962fb0cc322d006123d554a0
font_01_sfnt_off0000f37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37B 11492 bytes
SHA-256: 4f18f596e131020c401ea7faeac463bd44fd25ec91492cc3c9baf49fb35c5ede

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