PDF malware analysis — malicious · 026f278ecf4fad8c

MALICIOUS

PDF

73.0 KB Created: 2020-11-06 02:04:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15

MD5: 9ad356e303002a1fc4ef492403924c38 SHA-1: a748d1396620d16a5c3e418dd6bad4bb45ab0086 SHA-256: 026f278ecf4fad8c4c1e65fb4e0322135790597575cfe05dc75a6ea20467a82f

194 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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.
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://traffmen.ru/aws?keyword=to+kill+a+mockingbird+chapter+26+summary In PDF document text
- https://cdn-cms.f-static.net/uploads/4384644/normal_5f8c9b538112b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4402032/normal_5f92ff57af5d8.pdfIn PDF document text
- https://bexizenibumux.weebly.com/uploads/1/3/4/4/134481127/4702819.pdfIn PDF document text
- https://dojarugakafep.weebly.com/uploads/1/3/4/4/134471698/wamovobuwoxodup.pdfIn PDF document text
- https://wudizibi.weebly.com/uploads/1/3/4/4/134477582/mukepofuduj.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372987/normal_5f9358b808d79.pdfIn PDF document text
- https://fiselowozol.weebly.com/uploads/1/3/4/3/134366189/liminuvafumukiwi.pdfIn PDF document text
- https://jewadasin.weebly.com/uploads/1/3/4/6/134604584/812cfd452b.pdfIn PDF document text
- https://xanodupujariris.weebly.com/uploads/1/3/0/9/130969381/vurikuwabufaz.pdfIn PDF document text
- https://sedogosep.weebly.com/uploads/1/3/4/4/134486754/4776003.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/waxapoz/80819380349.pdfIn PDF document text
- https://s3.amazonaws.com/nonabafat/didinevenugorajaragowuw.pdfIn PDF document text
- https://s3.amazonaws.com/joterige/25134019189.pdfIn PDF document text
- https://s3.amazonaws.com/jagux/miwafubufekabozusigunago.pdfIn PDF document text
- https://s3.amazonaws.com/wajibile/47175058633.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5a53fc23-1aff-4511-a127-c9d3cd1d4b9f/divaroragib.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_off0000df18.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF18	6028 bytes
SHA-256: `87e901be3f89e28d0e268613fb028fb4ff5bd1106a2c05548df36ad30c8f141b`
`font_01_sfnt_off0000f376.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF376	10320 bytes
SHA-256: `8ebd588c7d189db4bd039785bb1258ff2bb90785d005e41c2ffa89823f050d32`

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