Malicious PDF — malware analysis report

Static analysis result for SHA-256 7389eae98a18d8d6…

MALICIOUS

PDF

68.5 KB Created: 2020-12-30 19:39:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a34ab239c4dcc99c1b2323bd92735ae7 SHA-1: 16e92ab7ee8cef80eda9d058a8785f8fcd78dae5 SHA-256: 7389eae98a18d8d6b053d3bb6e758a9611432308eece1e75e05ae8235d9347b2
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffine.ru/strik?utm_term=pet+full+hd+wallpaper+girl PDF link annotation
    • https://dokarugosili.weebly.com/uploads/1/3/4/3/134362608/b6d9f1aeb8dcc.pdfIn PDF document text
    • https://cdn.sqhk.co/fumazuri/RDkjeRv/kirufiwowu.pdfIn PDF document text
    • https://mipikarekegimo.weebly.com/uploads/1/3/1/6/131606279/nufowikax.pdfIn PDF document text
    • https://waluxine.weebly.com/uploads/1/3/4/7/134759732/simobo-tetefo-nepof-jokuxeweduza.pdfIn PDF document text
    • https://fulodovujigiw.weebly.com/uploads/1/3/4/0/134016909/1158152.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/8fbb684b2ec.pdfIn PDF document text
    • https://sesizapilutib.weebly.com/uploads/1/3/4/2/134266568/845236.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/widofafane/maltese_yorkie_mix.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/cdcr_exam_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faea38ed-c026-451a-bf20-a7b305a3a7b4/reading_spark_plugs_for_jetting.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/chambal_movie_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/nice_guidelines_on_epilepsy_in_pregnancy.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_off0000d176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD176 5216 bytes
SHA-256: 472536a9c08813d94e950298bc3eb1724fb0e15120a7a69b555e421df9d4898b
font_01_sfnt_off0000e346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE346 9900 bytes
SHA-256: 8bb9089165748a25bc84db37b37fb4a900702bc36b01a85c03a6321f49b63010