PDF malware analysis — malicious · 6a65803c58c09c1b

MALICIOUS

PDF

37.9 KB Created: 2020-11-07 17:49:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23

MD5: e62db09f333e0551c17b868d83ce2a79 SHA-1: 9c4a27af042d8e5c8a39b893fed02ad4f315d317 SHA-256: 6a65803c58c09c1bbfe22f599e07bfe5c09a77ae995607076586bb0650e9dde5

136 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 5

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.
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://trafffi.ru/aws?keyword=skull+foramen+game PDF link annotation
- https://cdn-cms.f-static.net/uploads/4447467/normal_5fa391c365bc9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377678/normal_5f90cb458a825.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393356/normal_5f8f088547e93.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404738/normal_5f92970bc4a43.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/memul/effortless_english.pdfIn PDF document text
- https://vadazigifexe.files.wordpress.com/2020/11/merozasopegujibe.pdfIn PDF document text
- https://s3.amazonaws.com/fatikonavori/psychic_predictions_for_2020_election.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/47e15286-ac08-4194-ab5e-92f0c5bdbec2/basketball_diaries.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_off000054b3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x54B3	5076 bytes
SHA-256: `6b6cba67f4954fb4bf1a8e1a19ba750a8e0f3f7fc9f111b401f31ba0aafffcce`
`font_01_sfnt_off000065e6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65E6	11020 bytes
SHA-256: `0b1154b8e2b07ba73cf7bcd6e179957545ad34ca2a39308cd173fdf067c85b3b`

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