Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f0e18ce009fbbc4…

MALICIOUS

PDF

68.7 KB Created: 2021-09-26 14:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 168a968d89374bde069e672555564977 SHA-1: 954781b8a29fc66d6c4eab9fd3ed1906e7b7fdbe SHA-256: 1f0e18ce009fbbc42f4ff9d839f5bdf86474ddb02cf8c24ff18727a99bf9bc7e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is a link farm on disposable hosting, with numerous embedded URLs pointing to potentially malicious content. The ML_NYX_PDF_MALICIOUS score of 0.998211 strongly suggests malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://krisoc.ru/uplcv?utm_term=how+to+update+yolo+on+android PDF link annotation
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16138e0c272f97---manadejunilaxuwel.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/75204756808.pdfIn PDF document text
    • https://ismart99.net/upload/files/28122028243.pdfIn PDF document text
    • http://vncdata.net/app/webroot/uploads/files/xemitavudevoxitisimedade.pdfIn PDF document text
    • http://thibidi.vinadesign.info/uploads/images/files/14733135654.pdfIn PDF document text
    • http://massimobertoarchitetto.com/userfiles/files/95612554672.pdfIn PDF document text
    • http://sin-hua.org/userfiles/xujuranedagexa.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/guwojugaxuzifugoju.pdfIn PDF document text
    • https://matfplayer.com/calisma2/files/uploads/binarusadazuvozuzesororov.pdfIn PDF document text
    • https://jechrina.gr/FCKeditor/userimages/file/48703221232.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/gidowepebuwulivibawa.pdfIn PDF document text
    • http://halmar.info/userfiles/file/16163716682.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/balobabikokakagotojuvasem.pdfIn PDF document text
    • http://oppedisanorobertosrl.com/userfiles/files/pitokijavorar.pdfIn PDF document text
    • http://www.supair-lux.hu/ckfinder/userfiles/files/67672064131.pdfIn PDF document text
    • http://ajej.pretty-match.com/upload/files/tubalafujatitonaw.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/c1hdlo7mbo9qvr2bffssu07227/84276054766.pdfIn PDF document text
    • https://sibconsulting.com/contents/files/5463102558.pdfIn PDF document text
    • http://ymmicro.com/files/files/bopiwobilozuli.pdfIn PDF document text
    • https://conviviodihera.it/dati/upload/file/feduzizibenexexujoza.pdfIn PDF document text
    • http://gomsuhoangminh.com/app/webroot/uploads/files/todumojavojefukuwopeg.pdfIn PDF document text
    • http://rancholasmonturaspremios.com/campannas/file/ragemugifavasikite.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_off0000aecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAECF 10508 bytes
SHA-256: 7ada00a41222f642fe277705573b3130779e5aea11f7719433ccc877e8223fad
font_01_sfnt_off0000c6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CE 14564 bytes
SHA-256: af331b1c2fbb0d7059bd3a9ad83f3f7c1001b37b35b06891686d0daa38c089bd
font_02_sfnt_off0000eb58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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