Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e3b33fae11525f…

MALICIOUS

PDF

87.9 KB Created: 2021-06-04 16:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7f2dfaded72864f693cd12e5147dbe2d SHA-1: 28bfb89653f9e6c35ea99485aa3b3119b25fcfe6 SHA-256: 18e3b33fae11525ffa33607287f3e31a0651365b2054060384ccfb0456c86195
156 Risk Score

Malware Insights

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

The PDF document contains multiple links pointing to compromised websites, suggesting a phishing or malware distribution attempt. The heuristic firings indicate the presence of external URIs and link farms on disposable hosting, further supporting this assessment. Although no scripts were extracted, the document's structure and embedded URLs are indicative of a malicious intent to redirect users to potentially harmful content.

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://crysiq.ru/uplcv?utm_term=who+took+jerell%2527s+ipod+lab+answer+key PDF link annotation
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8886dad72---76769693976.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/sojab.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/j7oqqs5h8t00kkpp52go4f7epv/32955701125.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/cebc815387c95f435172e7ca33273bf7/94162276601.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/f9f28km3eg2vc1o4lahbht46i1/97021986227.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a7493ae65c5---pukujufisubujuz.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/63138901318.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/vapokogum.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16091324fc6275---90195533171.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/8444a6b55a99340fd7fdf71e37415c1e/nifufuvabujefodesitizi.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/tewexegejawole.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/37281602952.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/dodipipezumijozemibome.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/75065899617.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_off00011946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11946 5568 bytes
SHA-256: fa09df53f21fb81a66eefdd475f997b61cad1ef10f25007e9c116534e6998a84
font_01_sfnt_off00012c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4A 11288 bytes
SHA-256: b449ddb48ddd66ef39717ab6fb581f95e30315e5fb426986cb9cca81af8b0ec5

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