Malicious PDF — malware analysis report

Static analysis result for SHA-256 273686a9f4cf704c…

MALICIOUS

PDF

73.0 KB Created: 2020-12-02 22:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0a5a5258b90365a389e1a2e2fb3e338e SHA-1: b6e26c361d780c6ee8be6f3f78debaa745ab32e7 SHA-256: 273686a9f4cf704c984ff45866c9eb95485cf9eff983fd877c2d22e72b114d9c
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests an attempt to lure users to compromised or malicious websites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=smart+waste+management+system+project+report In PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/sovonasob.pdfIn PDF document text
    • https://dajexave.weebly.com/uploads/1/3/4/3/134352807/pagilogedubofezu.pdfIn PDF document text
    • https://nigupisotaku.weebly.com/uploads/1/3/4/3/134374455/rawado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f8712bba61a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365539/normal_5fc5cde81f097.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/feffa490-b852-45fe-bcef-3ddccb1297ec/30171050793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5bc7c4b-ae3f-4149-87c3-08baaafb638d/3600780403.pdfIn PDF document text
    • https://s3.amazonaws.com/jevuxozazebazug/how_long_is_a_bachelor_degree_online.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/tetisax.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/college_prep_chemistry_density_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5449fd41-c87a-45d1-8907-0e7d013b5c91/53567257122.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8626bd1d-7f70-4a8c-b399-4ecbf61c3e8a/projeto_de_escada_em_l.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b50b04b-210c-45bc-b875-a41f79c7aaa5/muwupov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dbc2930-4c07-4404-bc50-fd2876374185/cybex_cloud_q_weight.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_off0000df36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF36 5596 bytes
SHA-256: 8829a3ea656dea4cd4c236d336998cb04a8b3a73e61db39a635938fdad25cd0b
font_01_sfnt_off0000f245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF245 10652 bytes
SHA-256: da21f6ad2e5f594408e46ace9d5919f5e810bb87c5b56a464bd2f76b8288b865

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