Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e11fcc5a7c65bb5…

MALICIOUS

PDF

71.9 KB Created: 2021-02-12 12:52:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 92365a70b26ed29b3ac51a185ac95165 SHA-1: cbbcb04ea2021f1fb9f295d7f7e38cc61bcef539 SHA-256: 8e11fcc5a7c65bb56b69275f08799afcca1c90555c3559e07c7304dda60572a5
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, and contains a large number of external links, suggesting a link farm or phishing attempt. The primary malicious URL, https://baarspo.ru/wix?keyword=vocabulary+workshop+level+b+unit+9+test+answers, is presented as a search result to entice users. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely related to phishing or malware distribution.

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://baarspo.ru/wix?keyword=vocabulary+workshop+level+b+unit+9+test+answers PDF link annotation
    • http://dobanojuwelog.22web.org/transformational_life_coaching_cherie_carter-_scott.pdfIn PDF document text
    • http://lenemoloj.22web.org/m72_law_manual.pdfIn PDF document text
    • http://xutuvulamarav.iblogger.org/fram_filter_cross_reference_guide.pdfIn PDF document text
    • https://gazobibulome.weebly.com/uploads/1/3/4/7/134775133/2064860.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/bogijexu/fmea_example_manufacturing.pdfIn PDF document text
    • http://vojapulipono.epizy.com/consumer_reports_best_used_cars_for_seniors.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/quality_management_system_audit_report_sample.pdfIn PDF document text
    • http://fenelepor.epizy.com/lanuvakasozasadunubev.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/sipuve.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/40686151873.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/56531056130.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/custom_gift_certificate_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/76029383994.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/puglia_food_guide.pdfIn PDF document text
    • http://jiwepatifon.rf.gd/95519209786.pdfIn PDF document text
    • http://muzonupifubofe.rf.gd/fppt._com_free_power_point_templates.pdfIn PDF document text
    • http://wepinipinalojud.epizy.com/68411003236.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_off0000dc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2C 5600 bytes
SHA-256: 59142eae6f66debdc0797dba2a5f366d4413917aeeff02de490c174b4c21fe82
font_01_sfnt_off0000ef49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF49 10044 bytes
SHA-256: dc034b34fd98db97e8f565fd88edcefe4c44b0187b5894e85987ced60d348aeb

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