Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ca0d4cd7175ab2…

MALICIOUS

PDF

72.0 KB Created: 2021-02-26 03:27:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e6a302901fee5067be4ea8187df09f42 SHA-1: 1360658fad8e178365cafdcd78c37cad3a457287 SHA-256: 93ca0d4cd7175ab22c7df88456164d53d9609a68cc782b87a1fabaa98e0ae8c9
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to malicious content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. While no scripts were extracted, the structure and URL patterns strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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://yafferge.ru/award?keyword=what+does+being+a+submissive+woman+mean In PDF document text
    • http://xexajume.iblogger.org/rilosogazebawanajozulup.pdfIn PDF document text
    • https://safamitiwifiro.weebly.com/uploads/1/3/0/7/130739579/8492976.pdfIn PDF document text
    • http://health2health.online/salary_increment_excel_sheet9ryjf.pdfIn PDF document text
    • http://ita-bio.space/95543971212rrp5d.pdfIn PDF document text
    • https://nukawidizuzaxep.weebly.com/uploads/1/3/3/9/133997642/3574724.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/denogumea4hk.pdfIn PDF document text
    • http://kind-insta.site/soxusizogv4qnn.pdfIn PDF document text
    • http://quinzsy-studio.design/gigabyte_kaby_lake_overclocking_guide5iyg7.pdfIn PDF document text
    • http://yourcy.com/81840905340g1h48.pdfIn PDF document text
    • http://ifeelgood.club/neoliberalismo_caracteristicasldzgr.pdfIn PDF document text
    • http://tomandbxof.site/metodo_grafico_singapur_1_editorial_santillanatwabo.pdfIn PDF document text
    • http://detonic-shop.website/xowopitedeje0vicz.pdfIn PDF document text
    • http://kinokaiff.space/dibitusle6g.pdfIn PDF document text
    • http://repair-monokoles.ru/98014926298gtzun.pdfIn PDF document text
    • http://silikidabog.22web.org/11181981346.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://satanomoxa.rf.gd/kalaporelamebizoroziwigox.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_off0000dd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD84 5416 bytes
SHA-256: 2b8d305d443113a3c9f331ca4f329ff3e9ee7829646e76c0d06e82fe4b6f9a8d
font_01_sfnt_off0000efe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE7 10300 bytes
SHA-256: 92f2e68b4f498df336506ef87fc3895228936ee2446cd5b151bd633fcfd42908

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