Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b8c14b4b0152f8…

MALICIOUS

PDF

70.0 KB Created: 2021-09-05 10:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f0004476d64a98732a3b145ce76366ef SHA-1: d9d7e1dfd26cf83ac07f7d8e99eded8d797e5722 SHA-256: e0b8c14b4b0152f8b35e79b5b8090201d6b3f390560777a399265b3ac47904fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The file's structure and numerous external links are consistent with a malicious PDF used to lure victims into downloading further payloads or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://wastran.ru/uplcv?utm_term=imperative+verbs+year+3+worksheets PDF link annotation
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606faea8c10f6---54585958313.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/xiroxosilozaxijosumipup.pdfIn PDF document text
    • https://iohrp.org/f_files/files/52842685989.pdfIn PDF document text
    • https://groupunsur2.com/contents//files/jexuxelito.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/anm31n8abjpb87b32er8bu0u51/vefotobajuwazo.pdfIn PDF document text
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/saweru.pdfIn PDF document text
    • http://seidels-mineralienwelt.de/images/uploaded/file/81974167613.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811517ed009---62647908798.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-6-28/20210628053639730263.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/pedubowujufu.pdfIn PDF document text
    • http://www.toptehnik.si/images/93696833242.pdfIn PDF document text
    • http://tlproduct.com/userfiles/file/6849531069.pdfIn PDF document text
    • http://danfilenemd.com/clients/67744/File/xopepipofebewovupa.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/mabunobokekesozifina.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/f9ff210d95bb68fbdbfd980f582c11b3/48365370476.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/183e3a5d05ffa2071baf999f46f6f352/88020008346.pdfIn PDF document text
    • http://oprandi.it/userfiles/files/10796280395.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/0rre025l63pei5snbq0o1qhuj1/53902093861.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c9236643bfd---91326301010.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/395cpqfc4m5pfladtghsk2sci5/36706043822.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/denafigofej.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/lco8qk1h7nt7f37h2t12vpsvk0/sifuzupikuwilo.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160ced62444153---81544211449.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/9327015083.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_off0000b28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB28F 10988 bytes
SHA-256: 3aa526eec69be54e367cf13de7e3b648dbf9d2ced81523c81c5708ab55539758
font_01_sfnt_off0000cbfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFA 15456 bytes
SHA-256: fec232762635994f86554ed60e2d4b62f17076db7f5d93cac6b6171e184e380d
font_02_sfnt_off0000f2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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