Malicious PDF — malware analysis report

Static analysis result for SHA-256 bece05a9643233ac…

MALICIOUS

PDF

79.3 KB Created: 2021-09-16 00:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 725808f265495317d0f094c573d1a087 SHA-1: 495ac334e2884e26d2b1a6f0cf7a9d0204fd4a00 SHA-256: bece05a9643233ac470785a73428a322a66b75e48dee60be7670da437c98c591
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically referencing 'city island 3 hack', suggesting a phishing or malware lure. The PDF structure and numerous external links point towards a link farm used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://inwebjor.ru/uplcv?utm_term=city+island+3+hack PDF link annotation
    • https://polenhosting.com/calisma2/files/uploads/dotusagelubetitubizofupuz.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/28812369200.pdfIn PDF document text
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/titoxujovukamutum.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/zenosejezepikolujanir.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/81000910685.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/74563356934.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/vidibemekudapag.pdfIn PDF document text
    • http://www.gdchgs.com/admin/img/files/kopekefezowupipufud.pdfIn PDF document text
    • http://livestocktool.com/d/files/75008952138.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137f366d171f---43843647297.pdfIn PDF document text
    • http://csc0898.com/userfiles/file/20210909180427_r1zge2.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/rerokikugimimuludosalor.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16134c9fe9cac2---18464543022.pdfIn PDF document text
    • https://birotex.rs/images/files/83558944376.pdfIn PDF document text
    • http://greentreeprep.com/cote_dor_import/admin/ckfinder/userfiles/files/39886754490.pdfIn PDF document text
    • http://15881588.com/ckupload/files/mawefosuwezi.pdfIn PDF document text
    • https://ikansambel.com/contents/files/bejuxupevubekeluxevere.pdfIn PDF document text
    • https://tresonance.org/uploadfiles/mofuwufefakikexidofowot.pdfIn PDF document text
    • http://hutbephottaihaiphong24h.com/upload/files/putetewixudabomajerabeg.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/31314001430.pdfIn PDF document text
    • http://lawyersmarketingusa.com/user_upload_image/file/In PDF document text
    • http://tw-tms.com/uploadpic/xw/files/21701351157.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/16231728443.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/nurigudakobefenezuz.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_off0000d5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF8 16180 bytes
SHA-256: 14b8de5926e368a6b218727d4fd614e2e5d72346e297ab5785b39705c05575b9
font_02_sfnt_off000117ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CE 10524 bytes
SHA-256: aa726b4ed221b756e2c97ebf53d0daef15b9834be6e257fc7a2499275b63fc9a