Malicious PDF — malware analysis report

Static analysis result for SHA-256 995fccbcfa9b39e6…

MALICIOUS

PDF

65.8 KB Created: 2021-05-23 18:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 30fe9e23e4cc0b9a00fa217c35c4ac05 SHA-1: 800f822ef7d4d9db26eba0bdd57b54cd232ba8f6 SHA-256: 995fccbcfa9b39e61c8b10cb7ad2389e444e74ea1270ecfd331347c918e40e7c
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many pointing to disposable hosting services, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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
  • 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://leonvi.ru/strik?utm_term=ver+peliculas+online+gratis+la+ultima+cancion+en+espa%25C3%25B1ol+latino PDF link annotation
    • https://pufokebisuniga.weebly.com/uploads/1/3/5/3/135324869/tagiwuramokidupagok.pdfIn PDF document text
    • https://xivamiwilazux.weebly.com/uploads/1/3/4/7/134742933/df30d9265c399a9.pdfIn PDF document text
    • https://ditaziretuviki.weebly.com/uploads/1/3/0/8/130874055/4481a63573dd.pdfIn PDF document text
    • https://xomikevogonenoj.weebly.com/uploads/1/3/4/7/134743799/furixixaz.pdfIn PDF document text
    • https://gebopudexor.weebly.com/uploads/1/3/4/4/134482947/5526641.pdfIn PDF document text
    • https://silemixijotin.weebly.com/uploads/1/3/4/4/134463531/de5e81421cafe.pdfIn PDF document text
    • https://fozegujulukov.weebly.com/uploads/1/3/4/4/134459046/nalimusetirisup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4c803f5-b4ce-4edc-a567-51c409b04317/fawokuvenotetobifepafif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae239499-7e14-4154-955d-f4392cd3f2f3/joxapukapuzibilonubulu.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/common_and_proper_nouns_worksheets_for_grade_3_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51424621-43b7-4c16-a29d-4b88b195fefd/29328559642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68c1dcdc-a769-4811-a017-77e86b8f571a/what_is_the_importance_of_listening_skills_in_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e375be7a-54a3-4073-b1e5-3ba1aa625ca9/como_matar_a_un_ruiseor_descripcion_personajes.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/fukajokodafafududitar.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/anime_watch_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/bam_bole_nath_song.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/zapep.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_off0000c214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC214 5428 bytes
SHA-256: b35e39c75ce182d7424d75f2b796687b11e19439db82de8ad8bc74a3f3689d54
font_01_sfnt_off0000d43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43A 10572 bytes
SHA-256: 2f0943c8ac38ba994ffcd79518276a90ca9ebf8b34d3ba8326fd86fc7ea50862

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