Malicious PDF — malware analysis report

Static analysis result for SHA-256 27945e9b7315f292…

MALICIOUS

PDF

77.0 KB Created: 2021-05-10 07:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 85ac2f9c835f4e94d1fd6cd26e23ae06 SHA-1: eda74bda0d6355c54c3fb7c2e8410dc33558e92b SHA-256: 27945e9b7315f292354240ec9e9b2cdfaeab31622de692e6ac28d992937a1756
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to be a lure related to a keyboard charging query. The presence of ClamAV detection and ML classification as malicious further supports its malicious nature. The embedded URLs are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ponafet.ru/strik?utm_term=how+do+you+know+if+zagg+keyboard+is+fully+charged PDF link annotation
    • https://waxutawuvesi.weebly.com/uploads/1/3/1/4/131455398/jikid.pdfIn PDF document text
    • https://xejotonevuxujuj.weebly.com/uploads/1/3/1/3/131379732/robeduva_muripoxu_zozuzupisevuvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451941/normal_6069872ce4189.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/fCjeggd/vimajazewuwimusu.pdfIn PDF document text
    • https://wobufijurix.weebly.com/uploads/1/3/1/6/131607063/1070944.pdfIn PDF document text
    • https://mofugitapab.weebly.com/uploads/1/3/4/7/134728490/03d50c3250f836.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375503/normal_5ff033973d896.pdfIn PDF document text
    • https://detubutil.weebly.com/uploads/1/3/5/3/135348338/fasovil.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/yhgNOcd/91362105157.pdfIn PDF document text
    • https://ritipovilij.weebly.com/uploads/1/3/4/6/134650849/famokejuna-migenufudazu-patudalafezeg-lefafutelowe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495696/normal_5ff8ddababd57.pdfIn PDF document text
    • https://cdn.sqhk.co/tavevalurov/hz6hfig/nosabafamufa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394079/normal_601ff3265961e.pdfIn PDF document text
    • https://cdn.sqhk.co/javijaxim/d0gejg1/39893002445.pdfIn PDF document text
    • https://dagepafu.weebly.com/uploads/1/3/2/7/132740813/bexekovibi.pdfIn PDF document text
    • https://rorezumi.weebly.com/uploads/1/3/4/5/134591247/tugavegotazumatuz.pdfIn PDF document text
    • https://jakilirimilibev.weebly.com/uploads/1/3/4/8/134862861/f60dbf50b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411931/normal_5fe84ac3aa921.pdfIn PDF document text
    • https://zimizediregewoj.weebly.com/uploads/1/3/4/0/134040679/jezato.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/nilititonawafim/how_to_translate_arabic_into_english.pdfIn PDF document text
    • http://relivoziz.atwebpages.com/pujituwuvatumufanapu.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/tuwekikogodu.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/62406486060.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/definition_of_validity_and_reliability_in_research.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_off0000ec6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6D 5692 bytes
SHA-256: 13c7ce73861cd6d79788d8010595cd43cf67649d5567286b7615a62abdbdf055
font_01_sfnt_off0000ffe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE4 11256 bytes
SHA-256: 717ac4da3fdbff0f68fd3bae3025485d5a3238f0ef59d62dd57c8a5ba07239d3