Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ade74b43a0892e…

MALICIOUS

PDF

89.5 KB Created: 2021-09-13 20:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1317eb5874d5c6e8d11c188c9fdd4b0b SHA-1: 46bfd55af779f5508b792255b998ba3374427522 SHA-256: e2ade74b43a0892e9cf962e6f7bfdd1c0c1222528d0d6a395cec091df473784b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of numerous embedded URLs, many pointing to potentially disposable domains, suggests a phishing or link-farming attack. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 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 http://sky1981.com/asset/uploads/files/fenimof.pdf In PDF document text
    • https://horkolas-gatlas.hu/ufiles/file/joxog.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/tevufujelixatuwo.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/35094106332.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210907170406416.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/78020855785.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613419528f09e---jiwidi.pdfIn PDF document text
    • https://ijieet.org/ckfinder/userfiles/files/wimekunu.pdfIn PDF document text
    • https://hongdung.vn/ckeditor/images/files/salivalixoduxamojezuzamed.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/mavejo.pdfIn PDF document text
    • http://pes.edu.mn/ckfinder/userfiles/files/52708270788.pdfIn PDF document text
    • http://picart-personal.pl/fckupload/upload/file/dewapar.pdfIn PDF document text
    • http://klpa.net/userData/board/file/26884975772.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/3fc01fd786ca455aa19c2249b2a41bef/77776314176.pdfIn PDF document text
    • http://okvin.org/userfiles/file/lipofumijamixojajalum.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/lefawatexejujejinerez.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/vuvufesozumi.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/57074364557.pdfIn PDF document text
    • http://mynotary.ca/sites/all/sites/mynotary.ca/files/90784856421.pdfIn PDF document text
    • https://alaqart.atelierleuthold.ch/userfiles/files/35174193505.pdfIn PDF document text
    • https://nulifeus.com/~nulife/userfiles/file/vexupeliru.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/biwirupusus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+get+free+money+in+adopt+mePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98C 17996 bytes
SHA-256: 508193688d4d033a6edf5ccdb70837a39d8a053abb2cd1137fe5ed47817b3085
font_01_sfnt_off00012829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12829 10816 bytes
SHA-256: 893af4ec014d6a45066b216e8eee0d16a57573a7f5a168b534c6e68b57f3cc20
font_02_sfnt_off000140f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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