Malicious PDF — malware analysis report

Static analysis result for SHA-256 2806ecc135d0436f…

MALICIOUS

PDF

64.0 KB Created: 2020-11-26 08:48:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 36f16b3ffcab670e773117bd4e74b2d1 SHA-1: 195c00f577fffab2b5a685e7f38d3d05cad92352 SHA-256: 2806ecc135d0436fc42c5dc9885663d0340f8235adfb1693ee945f3c1f209c0b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on various platforms, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

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://traffset.ru/strik?utm_term=eureka+math+module+2+grade+7+lesson+11 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380675/normal_5f8c1d757adbb.pdfIn PDF document text
    • https://sibinepenisux.weebly.com/uploads/1/3/4/4/134467302/limik_xajunu_vexefodilusojom.pdfIn PDF document text
    • https://tubemugipowiw.weebly.com/uploads/1/3/4/3/134345788/cf491664.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5fa18093e8888.pdfIn PDF document text
    • https://zolefixu.weebly.com/uploads/1/3/4/4/134432518/jajamu-xatatofo-tinoxum-vutisu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470391/normal_5fabdf0612920.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474734/normal_5fb68cc1dd8f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6efb320b-0ef9-4923-ac19-ed5b8c9b10d8/roduzezoseriveviwafol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfecb2da-bdec-46c7-b41a-ebddde21ba93/fosimotenilubutomuwixumeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c196a38-dd89-488b-891e-2fc3bc919775/70444486725.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/catia_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91d16c06-3d19-4bc5-b7fc-ba6fbebbdbb0/30329465379.pdfIn PDF document text
    • https://s3.amazonaws.com/radaruropivoje/34049638451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b3935f-a151-41bb-8a64-3fff386f4988/wufosugumexigerodatag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/074f4c0c-aab8-4eaa-8669-b368063669e8/kuzisidepo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2AF 5360 bytes
SHA-256: e870265504232cbd4cc39aef08a9d418c1b2738c52145f4f035759fbce329b9f
font_01_sfnt_off0000c4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D7 9344 bytes
SHA-256: 30697b2885c0103edc46188b6fce2d657a78fd0e3b33ecb0a8d987bd24a0a920
font_02_sfnt_off0000e4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D4 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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