Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c9928fa25b15cc…

MALICIOUS

PDF

75.7 KB Created: 2021-06-22 21:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fc286a7ae6ec31dba37cd2c132d10a1e SHA-1: 1f93673183dcd71a23c28b9a7136c633c6117ad6 SHA-256: 90c9928fa25b15cc58806c20cb9d9891953f0af5220d073b3a1d57bba535e02b
156 Risk Score

Malware Insights

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

This PDF document employs a link farm strategy, presenting itself as a free software activation key to entice users to click on malicious links. The links predominantly point to compromised WordPress sites, suggesting an attempt to host or distribute further malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing and trojan distribution intent.

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://queure.ru/uplcv?utm_term=file+viewer+plus+3+activation+key+free PDF link annotation
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/b03b54444e9bd4a27721ca786704b732/poxewu.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16085295b1426e---69940973241.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/26755589131.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/gg5853jq6qnpjqc4kad6hn8hu6/ratokororimofixofopof.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/bvqt0vjef7g1tef0c1vidmfda6/sutajomu.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/55d80a2b02d9d9986b55f2898bbd1468/24311322728.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2db6a8a56ffa0dc1e7dea22a747f809d/xenidibezon.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/t9edv4kstu19ratuer4868esr2/kemirepogulemijilatevivod.pdfIn PDF document text
    • http://camwater.org/media/files/19777850833.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/71232686724.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/93082425756.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/zenigawozi.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/0e60e08abe75aad248dd39a56a60b53b/somijifezawi.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/67866950203.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805278b698d---17427497374.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_off0000e7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BB 5448 bytes
SHA-256: 53bd8f8ec8c321e0d325b5aeafb575d2fab9ebd619bcbe419ae24fa7b8527a31
font_01_sfnt_off0000fa72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA72 11064 bytes
SHA-256: 6af3c30bcb74945954d486b569c8c52a3edf334c98d41b36f095aa6ded4af4b1

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