Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc2cafc54d1b3b3c…

MALICIOUS

PDF

79.7 KB Created: 2021-02-18 13:48:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c6396475c87fc496ba7e89492a347db3 SHA-1: 0225512a1f4a882241c0cfb4862458101d23a9fd SHA-256: dc2cafc54d1b3b3cf86fecabb8aed655c750bd74a9dc01a43eae593b482dfabf
222 Risk Score

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, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/123?utm_term=dyson+animal+vacuum+spare+parts In PDF document text
    • https://zavoroxovedigij.weebly.com/uploads/1/3/1/3/131398250/kelugif-debotabub.pdfIn PDF document text
    • http://jotipire.iblogger.org/kolujabiwibulevatixore.pdfIn PDF document text
    • http://itravelgr.com/derecho_penal_mexicano_gustavo_malo_camachov90rd.pdfIn PDF document text
    • http://strapslap.online/abidjan_principlesy5mpq.pdfIn PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/ed0c866.pdfIn PDF document text
    • http://fdvsefwfrw.space/10799287989h7y3m.pdfIn PDF document text
    • https://nobazivikiva.weebly.com/uploads/1/3/0/7/130776215/nefugirodozo-pokiritusipolax-futiroguxek.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/feSesij/kuvab.pdfIn PDF document text
    • http://mx50off.pro/10854278629yixos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sedobuxekazadi.rf.gd/environmental_compliance_monitoring_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/nanexakido.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/2640193082.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/movexameboladufigewareni.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/95520655900.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/faxijitobevidorojoreb.pdfIn PDF document text
    • http://kosejoviwo.epizy.com/hardtop_xp_comp_a_safety_data_sheet.pdfIn PDF document text
    • http://ferirapavo.epizy.com/aws_ec2_cli_output_format.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/bluedio_t3_user_manual.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_off0000f8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C8 5240 bytes
SHA-256: 1096ce2d27f95e53b873ec410209fd805b179560ae3a516937bca32661e86bac
font_01_sfnt_off00010a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9B 11132 bytes
SHA-256: 972f9ff7d4802a486a9840829359d331ea00f0c7522cf55e13c9c45c93b5dcf0

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