PDF malware analysis — malicious · ba01fa35e6dc1922

MALICIOUS

PDF

39.5 KB Created: 2020-11-06 14:00:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23

MD5: 1faf197600e04a111ba32f66d60009f0 SHA-1: 4d636c53b58689eeeb410e0978634bb02648ea34 SHA-256: ba01fa35e6dc1922c487040c84373beb5e6aaa80bcd115eedae1725c73802f5b

76 Risk Score

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://trafffe.ru/123?keyword=is+a+whale+shark+a+fish+or+a+mammal PDF link annotation
- https://cdn-cms.f-static.net/uploads/4368496/normal_5f9bc22214438.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4402711/normal_5f918bf249607.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370273/normal_5f967c5d1ae9a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375355/normal_5f8ba0778a085.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380082/normal_5f8ec5068e420.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388062/normal_5f8f996fa0cad.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4411218/normal_5f9399aaacf03.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/tevigotu/racing_games_unblocked_3d.pdfIn PDF document text
- https://s3.amazonaws.com/gedimuta/addison_wesley_science_10.pdfIn PDF document text
- https://s3.amazonaws.com/pafiganovavi/radial_nerve_stretches.pdfIn PDF document text
- https://s3.amazonaws.com/bezegoluzose/tiruluwusalizof.pdfIn PDF document text
- https://s3.amazonaws.com/nawosineromigi/what_does_lmk_mean_in_a_text_message.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_off00005d6c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D6C	5100 bytes
SHA-256: `35be15ac1d7c997bcd7c4ff9b7d9cdd88951f50bf83a1560ce54904e6f191ef1`
`font_01_sfnt_off00006ead.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6EAD	10096 bytes
SHA-256: `6bbcf23e0d12c157789c3f0cd57b741e1f5847ef8bcda489d4ee0d7e4508d198`

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