Malicious PDF — malware analysis report

Static analysis result for SHA-256 1daa1cf065992c2e…

MALICIOUS

PDF

71.6 KB Created: 2021-02-17 08:33:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f508d806ab4f671197b55efb2141c856 SHA-1: 33383a370edcc0f4c2cf41fbf56c62ab4f015eb4 SHA-256: 1daa1cf065992c2e8e91841a244f4e0fd4893462a6dcedddb2be4d26f1173ca8
186 Risk Score

Malware Insights

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

The PDF contains numerous external links pointing to disposable domains and link farms, a common tactic for SEO manipulation or distributing further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's 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://maypoin.ru/123?utm_term=pinoy+network+tv+channel+teleserye+recent PDF link annotation
    • https://cdn.sqhk.co/jivazufevi/gFsxthd/vutugod.pdfIn PDF document text
    • http://mivetofim.22web.org/windows_10_64_bit_bagas.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/jflRljb/31134572461.pdfIn PDF document text
    • https://zanomegujinax.weebly.com/uploads/1/3/4/8/134873542/liruvok.pdfIn PDF document text
    • https://xoxumowuna.weebly.com/uploads/1/3/5/9/135964844/20e4a.pdfIn PDF document text
    • http://damodudajipofem.22web.org/how_to_gain_weight_in_7_days_james_staton.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/tKCifDQ/xabezonuxisi.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/iiJjhhb/zezone.pdfIn PDF document text
    • http://nukowivoxom.iblogger.org/catering_assistant_resume_template.pdfIn PDF document text
    • https://juxibawazorar.weebly.com/uploads/1/3/3/9/133997202/851ecf34.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/e79c239ddcf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kanisal.epizy.com/mqtt_broker_windows_10.pdfIn PDF document text
    • http://xiposebajuremi.rf.gd/aula_de_ingles_bully_android_2018.pdfIn PDF document text
    • http://daloketo.epizy.com/bangla_koster_gan_video.pdfIn PDF document text
    • http://boxulinizisa.epizy.com/veripolefodesugewibufe.pdfIn PDF document text
    • http://bejutamukedus.epizy.com/how_would_you_define_bacterial_transformation.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_off0000dc1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1B 5208 bytes
SHA-256: 2d11650e270213bb5a1494ac6da24e3ab82b227a6fbb337f2d75ea244073fa5e
font_01_sfnt_off0000ede4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE4 10544 bytes
SHA-256: 8284c355e91f7fcf1769aa12ad7756e9b458b06dd8ad178fa8948497da292526

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