Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5a5134cbc147b0…

MALICIOUS

PDF

81.4 KB Created: 2021-02-26 04:58:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: aa20269194b623484675fb6e88f06c20 SHA-1: a682daff4f8999ecba9c0049e523afb83b63d159 SHA-256: 2c5a5134cbc147b0d933177a102bc07733c4a085353125b3d506871a4bee8670
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 pointing to PDFs, characteristic of a link farm designed to obscure malicious activity. The primary URL, 'https://maypoin.ru/123?utm_term=digital+marketing+full+course+free+download', suggests a lure related to digital marketing courses. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to host and distribute malicious content, likely a phishing or trojan payload.

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://maypoin.ru/123?utm_term=digital+marketing+full+course+free+download PDF link annotation
    • https://kobirozo.weebly.com/uploads/1/3/4/8/134846370/xaxazugemedexu-lubug-melunezaso.pdfIn PDF document text
    • https://viluvaxev.weebly.com/uploads/1/3/5/9/135974466/7279083.pdfIn PDF document text
    • https://vujivizu.weebly.com/uploads/1/3/5/3/135305207/e2764ab8.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/adobe_premiere_pro_wedding_templates_free_download.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/98093426674.pdfIn PDF document text
    • https://kazuvamelu.weebly.com/uploads/1/3/0/7/130738637/4176d6ecf.pdfIn PDF document text
    • https://fowowudajij.weebly.com/uploads/1/3/5/3/135312379/2628877.pdfIn PDF document text
    • http://tuvawom.iblogger.org/sabki_barate_aayi_video_song_pagalworld.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/53240151146.pdfIn PDF document text
    • https://tixovokibena.weebly.com/uploads/1/3/4/1/134109053/gomix.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/debamijizozexo/85845115827.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/28087148498.pdfIn PDF document text
    • http://nawulariwataxut.rf.gd/papedajonon.pdfIn PDF document text
    • http://tiwinifo.epizy.com/canoscan_lide_20_drivers.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/seismic_analysis_of_structures.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/simple_wheel_and_axle_experiment_report.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/jozatu.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/nazamukomen.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/what_is_your_greatest_weakness_best_answer.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_off0001000f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000F 5496 bytes
SHA-256: 79784725a6cec2381fd185928cbc845708f700ff0f02e9fae448e30294a887b6
font_01_sfnt_off000112c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C7 10884 bytes
SHA-256: 3062547890745b0f9133437b9d2b617b04043b97e2d3eb4c7ab2aa55fddba6e3

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