Malicious PDF — malware analysis report

Static analysis result for SHA-256 514002776e19b835…

MALICIOUS

PDF

44.2 KB Created: 2020-11-06 18:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 16a0801d8062079b23ecae605ee78a8e SHA-1: ed3067ea2290fa39d8c098c8162b280227ae8e03 SHA-256: 514002776e19b83516a9b684720d98b4948b2752d020db5d43a60de54f7884d7
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI and a high-severity heuristic firing for a redirector link, both pointing to the URL https://trafficel.ru/aws?keyword=el+dorado+springs+school+website. This URL is presented as a lure related to school websites, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafficel.ru/aws?keyword=el+dorado+springs+school+website PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391954/normal_5f9a84a628e68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449419/normal_5fa3e4a5a1ea7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366964/normal_5f8dbe55e3761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376600/normal_5f9ec9f9ae3e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f8edd4177ec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387408/normal_5f96691dc03aa.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/ede98dfc-d96e-42f0-9da1-23a80945e9ff/34348261245.pdfIn PDF document text
    • https://tafexoru.files.wordpress.com/2020/11/3294531957.pdfIn PDF document text
    • https://pozajifu.files.wordpress.com/2020/11/difference_between_cultural_heritage.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/oregon_performance_transmission_coupon.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/tafala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84d95c37-52b0-4ce8-b09c-eacc3a2fc011/6336446175.pdfIn PDF document text
    • https://fizafadolozu.files.wordpress.com/2020/11/31713389540.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE4 5524 bytes
SHA-256: 433d769590925f8a1a75bab689eddde92db49fcf3ccd96767abf2ffaff8f2e13
font_01_sfnt_off00007eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB6 11244 bytes
SHA-256: 0fc01ed3673ba9fa27087d26e07f49a63bd0752068562d5711201dd783d05868

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