Malicious PDF — malware analysis report

Static analysis result for SHA-256 15583d3a8e1d4218…

MALICIOUS

PDF

75.4 KB Created: 2021-03-09 10:33:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f3a628a8b39ad22659187b84e8d43182 SHA-1: 64e43059e8b48f8af97e9ebaceddbdf3b2f21aa0 SHA-256: 15583d3a8e1d421821c7ed2df26dbeef0c0adc1c2dedf362b1b8d973926f90cd
186 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, exhibiting characteristics of a link farm. It contains numerous external URIs, many pointing to disposable hosting, designed to mimic search results for election information. The primary purpose appears to be SEO manipulation or directing users to potentially malicious content hosted on these external sites.

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/award?keyword=odisha+election+result+2020+list+pdf PDF link annotation
    • https://guvizetajujuwu.weebly.com/uploads/1/3/4/6/134617183/wotomidesa.pdfIn PDF document text
    • https://talupujepanuzan.weebly.com/uploads/1/3/4/5/134595677/xirifoto-kakokizijex.pdfIn PDF document text
    • https://kawuruli.weebly.com/uploads/1/3/0/8/130814241/c44b6ac027c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451941/normal_600271d80c60c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476126/normal_6039dd2ec73a7.pdfIn PDF document text
    • https://danodukuwen.weebly.com/uploads/1/3/1/6/131637043/xukoke_potagabebis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459482/normal_5ff00b620d635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421473/normal_600f3345553de.pdfIn PDF document text
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/1728064.pdfIn PDF document text
    • https://bizonununifewe.weebly.com/uploads/1/3/4/7/134773553/abb46c0df597e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460263/normal_6026229441d09.pdfIn PDF document text
    • https://tugikijoxateti.weebly.com/uploads/1/3/4/7/134768699/lixaxixoxepiwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zavizalovop.epizy.com/police_technical_report_writing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81d7d5e2-fea6-4f42-ad12-9c813bf061fa/wipeluredifujugigasig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9e271db-9e22-4298-8db5-1839564953a8/sig_sauer_p220_legion_carry_sao.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef0b69a9-840f-479b-8314-0ef90f1e23b9/47853311264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9870e0e-232d-4b06-8f69-d7e84849143b/29901820189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fa257d3-9bd2-48d9-8b4d-506be682019c/nepagififadizuw.pdfIn PDF document text
    • http://robibedoramate.rf.gd/32774907602.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_off0000e7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E8 5544 bytes
SHA-256: b42e4778b629e6c5cbb575c94723c56b2600d83b2c1d624edc2ddb08992d561d
font_01_sfnt_off0000fab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB8 10596 bytes
SHA-256: 2e9f9031043ecfdc22c3ab8721bab47a86c9b249c92c95dd9b9597f50e5362ce

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