Malicious PDF — malware analysis report

Static analysis result for SHA-256 083b7da02079b6c1…

MALICIOUS

PDF

93.8 KB Created: 2021-05-18 06:50:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: def4afb4d42a1ad39075ddf4b17a1632 SHA-1: 7410df03c418181502d1bb938ce69d54520daf47 SHA-256: 083b7da02079b6c1552c68e1ab558a0fea157d0b58eaa4c04bea8493e778542e
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-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://bologen.ru/strik?utm_term=pokemon+legendary+gba+zip+games+download PDF link annotation
    • https://devuxitimon.weebly.com/uploads/1/3/4/5/134596282/c9d75.pdfIn PDF document text
    • https://vimanofadubob.weebly.com/uploads/1/3/5/3/135304206/9918232.pdfIn PDF document text
    • https://rezalebivug.weebly.com/uploads/1/3/0/9/130969918/lemefigag.pdfIn PDF document text
    • https://xadifopelizil.weebly.com/uploads/1/3/4/7/134771643/8551010.pdfIn PDF document text
    • https://gafipokezi.weebly.com/uploads/1/3/4/5/134594596/5396271.pdfIn PDF document text
    • https://nupanirosum.weebly.com/uploads/1/3/4/8/134858368/varemola.pdfIn PDF document text
    • https://serirufudo.weebly.com/uploads/1/3/4/7/134712976/91fe6f1216.pdfIn PDF document text
    • https://ramaxudefe.weebly.com/uploads/1/3/4/0/134042793/fabuxorute_ribeketukojitop_tolopikoj_genonolu.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/2d7fa8f2-c79c-4732-a686-165b80aafe58/3319507606.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/simple_website_templates_using_css_and_html.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/hp_deskjet_2620_ink_304_currys.pdfIn PDF document text
    • http://gasigigi.rf.gd/international_lawyer_jobs_europe.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/george_foreman_net_worth_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c2d09aa-6de2-4567-ab73-79c85408b735/craftsman_lt2000_parts_canada.pdfIn PDF document text
    • http://nawokuzowurib.epizy.com/eddie_bauer_quadtrek_travel_system_recall.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/xiwomugolivus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c86fc7a-fd4e-411d-ba29-6b52db0cf77d/47148646840.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/57064822498.pdfIn PDF document text
    • http://sulumasofip.epizy.com/have_outlook_pictures_automatically.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_off0001309b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1309B 5728 bytes
SHA-256: d14784b55def06db8fd87df720c8348203c20f0e310a87cf03035d0226ee554a
font_01_sfnt_off0001441e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1441E 11092 bytes
SHA-256: 8aa5b0a9ef941265df1d60f1df8bc836737c1349530d9b1629f7c375a3891bb2

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