Malicious PDF — malware analysis report

Static analysis result for SHA-256 e313fb4bfb974a57…

MALICIOUS

PDF

119.4 KB Created: 2021-06-13 22:34:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2a305e410b1afc90cb8106994c2ed9eb SHA-1: 62fc3718b3c02cca97df7d75ae2b13034c014966 SHA-256: e313fb4bfb974a57319d220125d77fc6e3a248710a4f613f067fd7330ae16132
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs and the document's structure point towards an attempt to trick users into visiting malicious sites under the guise of providing search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://philabc.ru/uplcv?utm_term=oracle+of+ages+manga+pdf PDF link annotation
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/njtsdcgd830rg8j1jta0g5g3ih/45512107649.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c972159aa---54445999249.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908c0e06519---20791451664.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/44017822473.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1d5d6c44d---nagimipetajaw.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf4eb46d64---16975213930.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/gibenatuxirawawejew.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/48576580925.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c508afb95b8---razibazo.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/17850719737.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/7ighngbpvtueg5mk29bdl4mvu6/kemomiroxebitop.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/17ba618fa4762ceaf5e8537a9d753c64/situmisukunurode.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/lc6p3urc6dmp6dfmmoo61f47j4/29805971843.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/75ccdb37ab1a4d253bd48444f7ceb27a/xuxub.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16072e1fa4b413---gotonuvewifa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16278 9492 bytes
SHA-256: 10c7202c77121ea0eee3c73b2dd79f15ae49e3edbd802069a0132851cea4e789
font_01_sfnt_off00018263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18263 5164 bytes
SHA-256: 9d50e3b30248688dce9c37974a322de60be08d31212791770b732f0e569a0aeb
font_02_sfnt_off000193cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193CF 14072 bytes
SHA-256: ca0a275c4dd80064d2150d498a000e54ed1632172b5e0306896cfea760927949
font_03_sfnt_off0001c164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C164 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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