Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ece3a9db43b9ed…

MALICIOUS

PDF

75.7 KB Created: 2021-09-26 21:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 426eca1856b5646bcedc210a1d419a87 SHA-1: 432bd8d80e7588c9157cae4fc5b527a4b930e477 SHA-256: d6ece3a9db43b9ed195d09107111fa36c3a46b3c67bf591312b5e1deaaeee63d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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://archism.ru/uplcv?utm_term=love+your+god+with+all+your+mind+pdf PDF link annotation
    • https://jpjplumbingandheating.com/FCKeditor/file/42955259939.pdfIn PDF document text
    • http://webbyshoe.com/fckeditor/userfiles/file/71089362848.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/xezulelemibawukaxupiwipe.pdfIn PDF document text
    • http://nhasachconggiao.com/luutru/files/33530499013.pdfIn PDF document text
    • http://cl-pub.com/files/files/nosoma.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/jemepolovubavij.pdfIn PDF document text
    • https://bdlvn.com/steel/upload/files/46397201811.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/17690643436.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614b9ac4d3b90---86765001938.pdfIn PDF document text
    • http://zhymwz.com/upfile/file/23898444801.pdfIn PDF document text
    • http://ngocphuocjsc.com/public/default/ckeditor/files/seborojutawelezeteruxusa.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/zuzepilonilesasemeravula.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/22897769396.pdfIn PDF document text
    • http://tasfor.com/files/galeria/files/lapowolagaki.pdfIn PDF document text
    • https://jmbarrenetxea.soinuenea.eus/files/galeria/files/43272622576.pdfIn PDF document text
    • http://mazraeir.com/images/upload/files/vijaraguvibirigavubeb.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/xepimo.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/gawusabijema.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/33624970772.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/14482006823.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/7160494152.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/8c5f896dcccfbcb5972f89c64cf31d5c/vudex.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/winusodujawujax.pdfIn PDF document text
    • https://3drm.bg/uploads/pictures/files/matibovexupefugo.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/zegelapam.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/dowujuvagotidawujipigis.pdfIn PDF document text
    • https://dm288.com/slicice/file/61639539607.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_off0000bef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF8 11100 bytes
SHA-256: f91919490ac0f892f1385997e8c4663015c0e85cf35825f5a60783983d076b05
font_01_sfnt_off0000d87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87C 18628 bytes
SHA-256: 65767a0e664150179039f345d973db692981517bd4e313a1a212f1bc462dab0c
font_02_sfnt_off0001093a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1