Malicious PDF — malware analysis report

Static analysis result for SHA-256 51e4baf865f3b72f…

MALICIOUS

PDF

73.9 KB Created: 2021-02-27 04:30:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b469934c3792c014dd6094e44ab6d696 SHA-1: 1c72dfa6994e35453bdc058d920f58178ce695e6 SHA-256: 51e4baf865f3b72f5df1f3bdc2d25d0186467a62e3261659b621b5fa72eae02e
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with one prominent URL pointing to 'bologen.ru'. ClamAV and ML classifiers strongly indicate maliciousness, specifically flagging it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=brother+hl-2240+software+download PDF link annotation
    • https://cdn.sqhk.co/tosemixuru/dmhhk4j/30699809494.pdfIn PDF document text
    • http://luminar2-download.xyz/9095611692371xe0.pdfIn PDF document text
    • https://takojetomegupaj.weebly.com/uploads/1/3/1/3/131382497/6574736.pdfIn PDF document text
    • https://gazobibulome.weebly.com/uploads/1/3/4/7/134775133/newobizejar-kawamanuwomizo-zasokeru-rafaxuzozu.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/7543291.pdfIn PDF document text
    • https://fusajebotiv.weebly.com/uploads/1/3/4/3/134320253/166e87d3.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/26371027779mussm.pdfIn PDF document text
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/vukememebup_sajafe.pdfIn PDF document text
    • https://cdn.sqhk.co/lulufebexefe/HifUahe/fesolamifapox.pdfIn PDF document text
    • https://zotawirimatoxo.weebly.com/uploads/1/3/4/0/134096886/3c230b4f45.pdfIn PDF document text
    • http://pixidilivutep.medianewsonline.com/vw_dsg_gearbox_code_location.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/saxefi/latex_template_article_arxiv.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/fineb.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/cisco_2960_8_port_poe_switch_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/bookkeeping_accounting_software_free.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_off0000e04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04E 5532 bytes
SHA-256: 225343ace917c4bbf39d67073ced29f202933b1bcae18b3027e4f6603029e807
font_01_sfnt_off0000f334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF334 11896 bytes
SHA-256: 90ca267f66f5369cba429fdba24e2b100bbbbe2df804f94a29e2a10ee623221a

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