PDF malware analysis — malicious · caf11edd4725a37f

MALICIOUS

PDF

34.4 KB Created: 2020-11-07 04:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23

MD5: 886431aaf861e8a3f4515c731db542d6 SHA-1: 5655f090778028ba74e9cdac1954a808d14fe772 SHA-256: caf11edd4725a37f0357ba87489e3e2e1b4f8aae8a63f55d5970958c2e03222c

84 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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=gospel+advocate+bookstore+texas PDF link annotation
- https://cdn-cms.f-static.net/uploads/4365619/normal_5f8f51f856479.pdfIn PDF document text
- https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/sevon.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453105/normal_5fa4f775e0071.pdfIn PDF document text
- https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/9180036.pdfIn PDF document text
- https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/47c459533cbbb61.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367640/normal_5f8d9a023c13a.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/vitelitubovuluj/clearwater_high_school_piedmont_mo.pdfIn PDF document text
- https://s3.amazonaws.com/dinigugaxej/feponaxegeripujir.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/460c1e35-01d9-476e-ba17-fc07908a90bd/5391811716.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00004511.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4511	5428 bytes
SHA-256: `a23bc269e8652cbc0af1b17f3aef68c1fb5bb0ac69d69400777c952f9d661832`
`font_01_sfnt_off000057a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x57A3	11012 bytes
SHA-256: `9ba0a2bbd36ad61fa4c69c4d8dbff45f34737ec8d0618b0f5376f68dc575a094`

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