Malicious PDF — malware analysis report

Static analysis result for SHA-256 487ef790464855d5…

MALICIOUS

PDF

69.5 KB Created: 2021-03-15 14:52:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 13870b8a9f0993b2b64fb5c7f69aca13 SHA-1: 4e1618151cf599b46c3176c46633b927810a36bd SHA-256: 487ef790464855d523d91f30de9faf2ed95cd04b6b10ec8f8547f1b9f17302a8
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a significant number of external links, many pointing to disposable hosting, suggesting a link farm or SEO abuse tactic. The primary malicious URL identified is https://vilenefex.ru/wix?keyword=fifth+book+of+the+new+testament+4+letters, which is likely used to redirect users to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/wix?keyword=fifth+book+of+the+new+testament+4+letters PDF link annotation
    • http://vpntop.info/mezezodofisokojogakinesudjter0.pdfIn PDF document text
    • https://tidukefawa.weebly.com/uploads/1/3/4/8/134851120/zagotazobetogi_bisut.pdfIn PDF document text
    • http://bloodcraft.online/boxubigebedevapegiviokwlr.pdfIn PDF document text
    • http://axecheat9.xyz/capacity_market_auction_guidelines_2019yy1ge.pdfIn PDF document text
    • https://vaviwajefumizin.weebly.com/uploads/1/3/5/3/135348181/kidoxafezegusu-motal-xezuwozarapap-nasitezukugiz.pdfIn PDF document text
    • http://filozajerezabi.getenjoyment.net/filipino_bread_recipes.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/how_to_get_a_international_driving_permit_for_japan.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/mevifiwezu.pdfIn PDF document text
    • https://vakevugulipew.weebly.com/uploads/1/3/4/5/134507067/lofosogu_diribum.pdfIn PDF document text
    • http://gta-msk.ru/37840369035b69vv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fosagoba/67707821652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ff864c0-a21a-460e-8b13-219585dfcb13/faviminapojupoliwulenogur.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/xusuzisutiverikosudawu.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/24404633961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b8d89e6-0d19-4780-8639-c34655226108/99147654723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa5150ed-496c-4dcd-bc5c-294e91eac48c/2120277690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2259139-c2b8-4969-8a20-3905df5ab539/genie_pro_max_limit_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8adcd906-9a58-4756-aae6-f9a5f7e8c34a/reif_principles_of_statistical_and_thermal_physics_f.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/dixedajaxatuvugolaxabifu.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/48077787375.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/chicago_manual_of_style_cover_page_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abdeba20-1380-4e63-a062-804213d0810b/what_is_a_declaration_under_penalty_of_perjury.pdfIn 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_off0000d1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B6 5344 bytes
SHA-256: 159a841bb469561fd50a6c5c621ade194f6d90e5f798b13e4ecc409dba15b43d
font_01_sfnt_off0000e3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D4 10568 bytes
SHA-256: f1638c01d00fbf88c97bf60be953ae38f131d448dea6036e3d110d16c99d83f8