Malicious PDF — malware analysis report

Static analysis result for SHA-256 13690e0fa86d9e58…

MALICIOUS

PDF

84.8 KB Created: 2021-07-17 18:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c48502e168754f0ec8bad50fd4888062 SHA-1: 244a9153c37ae85f2c0ba8be82f3b9cb2cd305e8 SHA-256: 13690e0fa86d9e58a80e3f5a81000d58ef9609510bf68b5db5df9265efee3dfd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external links, many pointing to compromised WordPress sites, suggests it's designed to redirect users to malicious content or download further payloads. The document body is unreadable, but the heuristics and URLs strongly indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/a66991d780bc6fbc58028c25b71dc49d/83754499611.pdf In PDF document text
    • http://danies.ru/ckfinder/userfiles/files/genizakujosajejefulale.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c60b1267b---penunatasaxanaxorobakan.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607075fc6d907---49302427777.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/cebe253fda4414a015b11df895eb8c31/49073561785.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb8e30540e---29854123623.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/81203624344.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac5ca37fd6---65665302824.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160d574c37cf9d---tidamajaw.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/56864753797.pdfIn PDF document text
    • http://texmet.pl/userimages/file/vijamibaluperaw.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d3087f378fb---jajivewam.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/40384740003.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/29377182438.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/115e5478d2b0492b7f1e593dd31a4d95/sijenanopoluf.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/muloje.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/3043bec855084069889eb20467ce5cd0/lopides.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/62edeb779ee643fa74a82a833ef7ecef/zeritavon.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/rolupamilitemazatupode.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/rinosusudotegunoxejoxifil.pdfIn PDF document text
    • https://webmenuplus.com/images/file/58688243104.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/7a2201c6f6ee5d46a4590c502a1e282a/zeravuduged.pdfIn PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/68112217688.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=new+zealand+financial+accounting+6th+edition+pdfPDF 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

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_off0000e6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D7 11024 bytes
SHA-256: 8014d5632cf20f8726eb4bb30d347cbdfa7309bf133eb7c4882d424eba2d9f51
font_01_sfnt_off00010041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10041 17300 bytes
SHA-256: 53b8b636787df6114ef783e0cbb46f91d6eb6493315d9baf97567ae8cb36a938
font_02_sfnt_off00012da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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