Malicious PDF — malware analysis report

Static analysis result for SHA-256 58534993f5089e4b…

MALICIOUS

PDF

84.9 KB Created: 2021-08-19 19:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8eea340030278d5c267eb2dcfbeea9dd SHA-1: a43f7950cf933e89ce46487b03490f30046df7f8 SHA-256: 58534993f5089e4b2affd3e4f8cee1695c073b5bf141e4110845fe071e0b5811
196 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to external resources, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://inncredel.com/uploads/48791564304.pdf In PDF document text
    • http://stlukesfp.org/ckfinder/userfiles/files/17870881218.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/11637426523.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/47438654581.pdfIn PDF document text
    • http://veterinariacomportamentale.it/userfiles/files/95102555776.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1625678937.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161071f561eed4---75374420303.pdfIn PDF document text
    • http://fournitures-reliure.com/prod_files/65127586313.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/68873492397.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/91328455537.pdfIn PDF document text
    • https://activepymes.com/pub/file/nosesovemupux.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/83671293104.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/85c7ecfc75804981d23d657499585e62/29798954672.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076cc4b32196---66774658025.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/sizokakuvilobada.pdfIn PDF document text
    • http://lucidareemantenerepavimentifaidate.it/userfiles/files/65273428172.pdfIn PDF document text
    • http://klwas.org/userfiles/images/file/83064946037.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2fca0584e6---gunasaxebafi.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/18958232291.pdfIn PDF document text
    • http://gphs84.com/clients/866382/File/96704719516.pdfIn PDF document text
    • http://oticonshop.com/ckfinder/userfiles/files/76770631657.pdfIn PDF document text
    • http://cnkls.com/userfiles/file/1627890255.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/10025895767.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c744b533dff---46649617756.pdfIn PDF document text
    • http://sportschoolindex.nl/images/uploads/35381394689.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=m+name+photo+full+hd+downloadPDF link annotation
    • 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_off0000f153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF153 14360 bytes
SHA-256: 33373c4ab777724169c21116ec51ac1b5c2a8f32867fbbeed3508e55549eea91
font_01_sfnt_off0001155e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155E 10584 bytes
SHA-256: c70169259594c19af24d6a573c5ceee1dd4bfd01276ad9d7d797826f7f71ba3b
font_02_sfnt_off00012d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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