Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca24b1cac5186b2…

MALICIOUS

PDF

76.7 KB Created: 2021-03-11 01:33:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ed67652d0465e9fe12167c0335252c0f SHA-1: 1059e7649e9abefe07e74a1f3d5b45a7e554cc30 SHA-256: eca24b1cac5186b21b71f85330fc56b1c2ab9130a0cdbd7440ff915f7a9c6621
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a known malicious redirector. The document body is heavily obfuscated, but the presence of numerous external links suggests a link farm or phishing attempt. The ClamAV detection and ML classifier further support its malicious nature, indicating it is likely a phishing or trojan delivery mechanism.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=teaching+speaking+skills+pdf In PDF document text
    • http://xelasurugopu.mywebcommunity.org/internal_combustion_engine_parts.pdfIn PDF document text
    • http://bobujopolodusol.mygamesonline.org/abdominal_pain_during_pregnancy.pdfIn PDF document text
    • http://salimom.mygamesonline.org/application_of_attribution_theory.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/what_is_literature_in_college.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/53914978756.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/22f88abe-03fb-4069-bbf4-3fec9be04500/what_does_e3_code_mean_on_power_pressure_cooker.pdfIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_16c712ef32964d0ea80b339596dc242a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/32064533589.pdfIn PDF document text
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_652a92102abb4f368ce9a9e1bff31664.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/72a28ebf-7201-4b52-b188-0a3e77e24d2e/vojebolazinubamasojuti.pdfIn PDF document text
    • https://6c639bf1-704a-4500-b661-329758898742.filesusr.com/ugd/02d620_e83966eabdc9473bb162b1df6d05a04e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/what_is_microeconomics_with_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b2403d9-8dd3-4e04-9b8e-a63dd71f2a62/bugowapakijibepa.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/chest_fly_form_machine.pdfIn PDF document text
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_81d5de95df904b71905f71846916d402.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/best_professional_cv_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/58646803218.pdfIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_5c99fa296f5145f7a45185223e369d66.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_off0000f076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF076 5336 bytes
SHA-256: f439c02ddf5d381398547b00366d3d1c5eea63ee0a92545ab32a5dc82b028b58
font_01_sfnt_off0001029d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029D 10184 bytes
SHA-256: f60e5eb1f1adc86185d3880e9572b3dd8a3902b54886732ed72d2bab346301ef

Open this report in the interactive analyzer, or submit your own file for analysis.