Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea27120982bc4fc…

MALICIOUS

PDF

75.4 KB Created: 2021-06-14 18:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 841d37197eac5319928396497c9c3316 SHA-1: 7d056ebd894dcfd6f003eb4f2113bc7c1f6838f6 SHA-256: aea27120982bc4fc5efc9129281722ed7eb7ecd7e18ff95be54388dd41aaa01a
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://drafthe.ru/uplcv?utm_term=mi+8+vs+mi9t PDF link annotation
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160833012405ed---nukivigivudemaro.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/kibemoza.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/76470294712.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/48633d2c7e142bdfad7c3db11fc196f8/rusixufasuxome.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/1ea9ed5598f1d7ba0f054c83359cabe2/mavagojinipixa.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/xajapowobatevi.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/d924e443c3ccf98c1e5a8512d7d552b0/furobaxogadubazaleji.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/54699817345.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a94bdda22d---jarabojegokusimukavo.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608af113e69f0---godonozutiferola.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/c18aa668d09cee9934bf2270ce331491/kagoju.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/lerasanopamemetenozibofo.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/s5o47rl89a9oegii5o8legmc48/62343692866.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/54fecfaff69d0242d5c349cda98a13bf/lidijulavum.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/27917c9bf5c1c3faf8ddb586bd6689df/vivuxotev.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/fenoxolufuvemi.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/abc6869c673fc0dfebd4b4d2433fe8b8/93097586658.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE657 4908 bytes
SHA-256: 265e2f02232c962c88f510deb40852bb3845be06cd5980354d2554243378d9ec
font_01_sfnt_off0000f70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70D 13484 bytes
SHA-256: 1a7b7e0962b6041b86911a246fd0f573426a11467856bb464f26ae18c10aee95