Malicious PDF — malware analysis report

Static analysis result for SHA-256 59efb2136d93c893…

MALICIOUS

PDF

100.3 KB Created: 2021-08-20 04:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: de7548314d3bc1d03bba1e7e0d6d0a89 SHA-1: 7c0b64c191d7560a373df201acdf5e0f0e8c0933 SHA-256: 59efb2136d93c89390c02cd11e5439fd8c9a6c228745087c0a7212ca6df8d933
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous embedded URLs that point to other PDF files hosted on various websites, some of which appear to be compromised. The primary purpose seems to be directing users to potentially malicious content through a chain of redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://ketchas.ru/uplcv?utm_term=delf+junior+scolaire+b2+200+activit%C3%A9s+pdf PDF link annotation
    • https://laser123.com/geektic/files/20028593301.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/89788926106.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/6224562824.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9a58139a5---pipixosijutumoza.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/17168513347.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/topudusubuzexonodor.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/7e9b6da2ae5c5c6f1d513f961feadbc7/jejejov.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/10744431154.pdfIn PDF document text
    • http://unitez.net/images/newtech/files/35288556594.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/netanolosizamafox.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160fc5b2c8b008---85449260117.pdfIn PDF document text
    • http://fiorenzuolatrack.it/userfiles/files/makurudavifalile.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/75291130777.pdfIn PDF document text
    • http://azbuka-d.ru/ckfinder/userfiles/files/duzatapadop.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/9196237218.pdfIn PDF document text
    • http://freetourscadiz.com//ckfinder/userfiles/files/kuxisuzinokovib.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/75805095245.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/8roepc55gscub07a3dra23vp14/fizelegazi.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/cdd0f1a72f93091450b2b6862bf5ecc1/48540017519.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bfaa1f046b4---rarararaludo.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/au4fdbgj3r7h4a6akb8v1gvh76/42695673095.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/3b101c9665f0b35a662bedc486bd47ab/89479675873.pdfIn PDF document text
    • http://dpholding.ru/uploads/files/61148179386.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BC 20852 bytes
SHA-256: e4a946adfcf1908cfdecfa8a9073151644ab549eadb661bd046a67f4604a3e4b
font_01_sfnt_off00014cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001650a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1650A 11444 bytes
SHA-256: 596b2cbf1d78e7bec91a3762b7602c08f359b11ef04b01bf93718b66d436df37

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