Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3e8e1a5223f6f8…

MALICIOUS

PDF

96.2 KB Created: 2021-08-17 08:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bee30c8efbfe155ff25d46681fac867f SHA-1: a55e3ed62234e8832159f9d242e32581066f1174 SHA-256: 4e3e8e1a5223f6f8aaf6d03bf8a95afd9522e801c7b44e92c1a3bd15008960fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains a link farm pointing to numerous domains, many of which are hosted on compromised WordPress installations or appear to be disposable. The presence of these links suggests the document's primary purpose is to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://mediaget.ru/userfiles/files/77002809260.pdf In PDF document text
    • http://websteravelandscaping.com/editorData/file/43922152078.pdfIn PDF document text
    • http://www.moyekolodin.com/files/dupileduli.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d639c75ee9---70871802653.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16091e09fa50fd---32991103585.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/mumawerowukasunezinaja.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/rimozezajebejaxod.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/161006ba53f5f2---fosemosorivowazorok.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/joxas.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8ffa8a762---sinefavaxi.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900e1959a93---38357106765.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/0rjm2ap16isr72q8ndgcj8ghhm/waxogeka.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/menalutumepedezenepex.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/4250f276af4ff1461f06f32811183055/76476560659.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/15830623102.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/97f2ecdce59889add055441066ca961c/43146015799.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/9686056644.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16074af2b580cd---64643060499.pdfIn PDF document text
    • http://boletin.alicantehosteleria.com/lib/ckfinder/userfiles/files/57801861550.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/lifedanekaniwive.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210629_173C93E408314A53.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=what+to+give+a+blue+tongue+lizardPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/8ec05577995fb3ed13c97d04a2397d05/soliwotokovejivapirexuzaj.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_off000114b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B2 10720 bytes
SHA-256: 58e157b55c825dec1277f86b9ec03e00169c739b6476c9b079e97278a3635679
font_01_sfnt_off00012d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14529 17904 bytes
SHA-256: c16d9799276d9c6143d7db14f434ccecc64fc57cd462ac4a3f5fc857cabf233b

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