Malicious PDF — malware analysis report

Static analysis result for SHA-256 e62fa76190fb11bc…

MALICIOUS

PDF

84.2 KB Created: 2021-10-04 16:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a41c7a0527e160769f1f129c9db7715d SHA-1: a44fd9b42ea01dccaced4d7444b4b821c2892896 SHA-256: e62fa76190fb11bcb4c95a451857ad290aeedf5ea19e5ec33e5118015f69534d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded URLs, many of which point to disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://pixomot.ru/uplcv?utm_term=sixth+form+interview+questions+and+answers PDF link annotation
    • https://hongmao.tw/uploads/files/202109190318408549.pdfIn PDF document text
    • http://intersonik.eu/upload/files/21902141014.pdfIn PDF document text
    • http://flyingfish-stay.com/userfiles/file/povadusituk.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/kesodagakelokipagib.pdfIn PDF document text
    • https://tidurmalam2.com/contents/files/tokano.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/24111486097.pdfIn PDF document text
    • https://wroclaw-effatha.pl/grafiki/file/juremoxevojoviteduromud.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/50908766709.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/43447033778.pdfIn PDF document text
    • http://phunphu.com/userfiles/file/zipibibepitodalixulubixu.pdfIn PDF document text
    • https://photojet.net/userfiles/file/jutemopifa.pdfIn PDF document text
    • http://wlpp.net/images/blog/file/wewesoforuva.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/zosugexumurasasuganeri.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210912_5B01505FB0D10BFD.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/65272775185.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210927085835.pdfIn PDF document text
    • http://imdad-egypt.com/userfiles/file/tumavojumokonegep.pdfIn PDF document text
    • https://atlas-consulting.ro/fckeditor/fisiere/file/97828834488.pdfIn PDF document text
    • http://tsyrulnikov.ru/upload/file/dimalufevepilofokekad.pdfIn PDF document text
    • https://cyklo-wellness-penzion-palice.cz/content/kawiterabajuxadodaref.pdfIn PDF document text
    • https://noelex22.org/userfiles/file/66078017933.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/tuwajiliwiluxowe.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/gafofepibo.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090407462173499.pdfIn PDF document text
    • http://pro.ovh.net/~tribuene/images/banque/file/74870765670.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://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_off0000e41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2D 17636 bytes
SHA-256: 3d2b20822a5dc3d6eb824a9a13c3b49fa7ef67d8e63d4bc4b4dfec787a718909
font_02_sfnt_off00012986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12986 11148 bytes
SHA-256: 7eb3905834e0be3301bf3dc5fd01c3d05784324f6c725ff4def58a5399e9b9d3

Open this report in the interactive analyzer, or submit your own file for analysis.