Malicious PDF — malware analysis report

Static analysis result for SHA-256 dadda4b15b92162a…

MALICIOUS

PDF

85.9 KB Created: 2021-06-17 06:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57a9f663f1e9a64ed5b5ecea7b23aa46 SHA-1: 3e251036b7c53a8bc4435d99bcd2df372c13f9fd SHA-256: dadda4b15b92162a452cc38c77d0aa1e4243eaa66a09178e09ffeedd65b08076
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute phishing content or further malware. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or credential harvesting campaign.

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://coretry.ru/uplcv?utm_term=define+the+term+independent+variable
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ff90bfac7---vonejok.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/pkdavgqppd39vql1pt837ei576/40097491196.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/7e9c843fbfd5b551bddff44609872508/60776887530.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/v5lq2mqgg9l9fnl3gqbrelc17s/10145063676.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609beb9c60f76---vogulojivufozu.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4c4a0b1f5---56055061171.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ac87f971981---77543994731.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/9f2389c1d947785c3052cfacca6025e8/womilulotafuvatipeg.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846216a3384---992922890.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c9a1c1e52---masetisopox.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/46634deaf64cd3516b4487582bbc6c51/57215325810.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/aomf1gfannn5j62fu6hgbic2oq/22949036734.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb0d78a3ad---6956234924.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609852e9cb8d6---91639151959.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/ab874985889b14690e6dc7df19c073aa/jipulofefad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ebf.bin
1c00c189810cef39f3ff37cbba8172ba22fa9d543ff907b8336ee3946d2298b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBF 5304 bytes
font_01_sfnt_off000120a4.bin
4c4fe7e742b2688ce83331c4a7857a25a3d2a2a1e3cf03973fa01cf71a97506d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120A4 12432 bytes

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