Malicious PDF — malware analysis report

Static analysis result for SHA-256 254a59ecfbd349e3…

MALICIOUS

PDF

63.5 KB Created: 2020-11-16 14:55:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 55a32420930a833d00fb5cbd9058073f SHA-1: d3f537b47e3367fc8931802453eaef7cc9f8fca5 SHA-256: 254a59ecfbd349e35c9a224d5fbd86fb9bc709b4a954767edafecaab08707759
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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://traffset.ru/strik?utm_term=arduino+ham+radio+projects PDF link annotation
    • https://jesokawafaz.weebly.com/uploads/1/3/4/6/134626724/151e8b.pdfIn PDF document text
    • https://zoxipunawogedo.weebly.com/uploads/1/3/4/2/134235683/99cff5.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/wadixosajukipa.pdfIn PDF document text
    • https://dexidexida.weebly.com/uploads/1/3/4/2/134235246/4320473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_5f90761c2d8d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387226/normal_5f91835e008aa.pdfIn PDF document text
    • https://jolamaripewefof.weebly.com/uploads/1/3/4/6/134655052/586621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416919/normal_5f9ecf8222551.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/5da5dfc9-d14b-4c4e-9428-38e066ab1238/13241898101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11553748-de17-43be-99d6-efed53eb3bf2/67169393780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec8b9b5a-76de-4ac7-92dc-eb5df6d4e92d/momuwizojesipabugizabim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90979125-cd3a-4b4c-a950-56a6dba8f272/56999797509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc333d06-d6aa-4edd-a355-7d1428c28d65/45872846980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f02dce2-a7e0-4243-8243-b67702096b89/latest_creature_found.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_off0000af00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF00 5228 bytes
SHA-256: e7644740c77a64c58bec31c603e924dd7feaaaac6b33e005890d0db79adfa846
font_01_sfnt_off0000c095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC095 10168 bytes
SHA-256: e98817e08dca424f27d9163f4c6d793fa7a5caf6541cc33d157a934135ac50cb
font_02_sfnt_off0000e34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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