Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bf6d4f507a0aa79…

MALICIOUS

PDF

78.9 KB Created: 2021-03-11 20:39:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: e29b0c97962a9fadac09f568f63e653b SHA-1: 1617b0980d99d537487cc0e72b8d068218e85442 SHA-256: 5bf6d4f507a0aa794d943664c71fb8c8860bad17128fe72012aea7e6a5f3bcd9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful websites.

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
  • 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://jottigo.ru/123?utm_term=meaning+of+balance+of+power+pdf PDF link annotation
    • http://hocostyle.ru/pressure_washer_pump_replacementg0bav.pdfIn PDF document text
    • https://javesobasi.weebly.com/uploads/1/3/4/7/134736097/a97d470c51006.pdfIn PDF document text
    • https://mikuzowadakan.weebly.com/uploads/1/3/1/3/131383480/d1e3d2d205.pdfIn PDF document text
    • http://kufowawixapiva.sportsontheweb.net/thank_you_maam_by_langston_hughes_video.pdfIn PDF document text
    • http://urott-hu.com/30291510542dpu7r.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/setomowaxomitidakazu.pdfIn PDF document text
    • https://gedibixofesona.weebly.com/uploads/1/3/4/6/134688069/6ced4.pdfIn PDF document text
    • https://dajusokododolin.weebly.com/uploads/1/3/5/9/135964726/f82ff397e533d.pdfIn PDF document text
    • https://gunagejosiva.weebly.com/uploads/1/3/0/7/130738835/7131894.pdfIn PDF document text
    • https://ludivolufag.weebly.com/uploads/1/3/0/7/130739835/50d4f6743257151.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lazolu/desakukimefe.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/2012_sonata_2.4_l_oil_capacity.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/intel_cascade_lake_vs_skylake_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/14084920665.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/jurnal_cacing_tanah_lumbricus_rubellus.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/kahoot_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/spinal_tuberculosis_radiology.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_off0000ea99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA99 5088 bytes
SHA-256: 1d522e9c8dab69057a2264f85e771b04ddd53ad7b33b3a4170a351b070b7d4b8
font_01_sfnt_off0000fbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF8 11024 bytes
SHA-256: eb0786afba6c65c0f9b01681f4b9ec3af173ea9545ce79d274fa1e410d92b62c
font_02_sfnt_off000120a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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