Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b5ec63ebc9f67b…

MALICIOUS

PDF

89.6 KB Created: 2021-09-22 13:35:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dd232f8e439b527b2a4f3e4d384b2dc6 SHA-1: 865222c16bbcbca2c29e99a3c25e1d887e34cfb8 SHA-256: 15b5ec63ebc9f67b67714dae340b88bf8df508e8f47ce7cc81712046cc0d2314
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs, including a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://queure.ru/uplcv?utm_term=trolls+world+tour+full+movie+123 PDF link annotation
    • http://budaors.varosom.hu/userfiles/files/80000031838.pdfIn PDF document text
    • http://ohdiabo.net/images/ckeditor/files/pegajuf.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ad1737bf08---madebikunaditufak.pdfIn PDF document text
    • http://belean.pl/userfiles/file/bawekaz.pdfIn PDF document text
    • http://jtravel.clickis.kr/FileData/ckfinder/files/20210909_AA2E9C61317D362D.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/5e3bb4612953c799107d76aa31612ebd/38905222167.pdfIn PDF document text
    • http://bburago.info/admin/fckeditor/userfiles/file/29809526150.pdfIn PDF document text
    • http://patanjali.zohukum.com/ckfinder/userfiles/files/25251758949.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/nugisesobozizan.pdfIn PDF document text
    • http://poaglasses.com/uploads/files/202109170547284834.pdfIn PDF document text
    • https://halkapsikoloji.net/userfiles/file/mikipikus.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/77847125884.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/sonug.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142e2d05aad4---4030061448.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///jubabixonewukuzupitadedo.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/95432741639.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/8915816685.pdfIn PDF document text
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/93185724378.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/45207458506.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/12505537083.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/leumd9v65jokogvq453kt2m8j5/27453542542.pdfIn PDF document text
    • http://lokalizacja-gps.pl/userfiles/file/taxesupozodejizi.pdfIn PDF document text
    • https://9ja-bet.com/userfiles/file/80848640857.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/65367753909.pdfIn PDF document text
    • https://oazapiekna.com/zdjecia/fck/file/ragenazorasuxunapibi.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/feganonukepumukuz.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_off0000ef04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF04 21664 bytes
SHA-256: 31597c9e4bdc7cf166b8fde2e2e43c0a01fa5817a1b7de99c8ee8e31ccc95ef3
font_01_sfnt_off0001279f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB6 10808 bytes
SHA-256: 7cd837aefcb39170429f26cc10549ca83f43538fd22eab3f52b0af744a3139e3

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