Malicious PDF — malware analysis report

Static analysis result for SHA-256 1816bc89032fd6f3…

MALICIOUS

PDF

76.9 KB Created: 2021-02-22 08:43:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 759938f5638354d89e2db48656994ed1 SHA-1: 31b1eecf0cdad62d380388d806e44eceae2a1a61 SHA-256: 1816bc89032fd6f358f4ade3d6614b6496fdc9db6a20969f7e66befd9b930ca6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF link farm'. One of these links points to a URL that appears to be part of a malicious SEO strategy or a content distribution network for potentially harmful files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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=conceptos+de+derechos+humanos+y+sus+autores PDF link annotation
    • http://jukomanafow.22web.org/87296189260.pdfIn PDF document text
    • https://pibusabet.weebly.com/uploads/1/3/4/6/134695111/607fbd5.pdfIn PDF document text
    • http://sipoxamux.22web.org/editor_a_word_online_gratis.pdfIn PDF document text
    • https://xirejefeju.weebly.com/uploads/1/3/4/7/134723985/5459694.pdfIn PDF document text
    • https://funifagokose.weebly.com/uploads/1/3/2/6/132681236/vivatutugetane.pdfIn PDF document text
    • https://jokilexagazoxo.weebly.com/uploads/1/3/4/6/134602179/mujusuwijididet_kuzajovo_beduterixa.pdfIn PDF document text
    • http://vadusulu.iblogger.org/donald_duck_meme_template.pdfIn PDF document text
    • https://tixovokibena.weebly.com/uploads/1/3/4/1/134109053/602d0b73fca.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/mijumomub/playfair_display_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/kejakekozu.pdfIn PDF document text
    • http://gitogopafo.epizy.com/11267250069.pdfIn PDF document text
    • http://wesovipimamino.epizy.com/21726903781.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/buvirepewutugogiwi.pdfIn PDF document text
    • http://zunuwovadete.epizy.com/let_us_create_man_in_our_image_hebrew.pdfIn PDF document text
    • http://wekijedi.epizy.com/ms_excel_formulas_in_gujarati.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/76256455632.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/92703902637.pdfIn PDF document text
    • http://wugepigen.epizy.com/how_to_clean_out_a_rug_doctor.pdfIn PDF document text
    • http://natexekazedap.epizy.com/art_and_craft_ideas_for_teachers.pdfIn PDF document text
    • http://zikomum.epizy.com/audatex_estimating_software.pdfIn PDF document text
    • http://falufobi.epizy.com/adobe_audition_and_audacity_free.pdfIn PDF document text
    • http://wevikokuzufos.epizy.com/cch_hack_cafeland_android.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_off0000ec5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5E 5288 bytes
SHA-256: ba9e1e8730e7b36ef900c377369ed0a1efc7815b770aa2744d3e64caf6d970a7
font_01_sfnt_off0000fe2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2D 11552 bytes
SHA-256: 44a87a7bc8faa832cf9445f1a5584e02bdd3eaef3d5778512c809a7d549695e6

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