PDF malware analysis — malicious · 779df3a3852830e7

MALICIOUS

PDF

71.5 KB Created: 2021-02-25 04:52:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10

MD5: 236ec5c38f04d22593fe23b5aea5741d SHA-1: 84eef995076fa06c441c127b626899a78b6c6e45 SHA-256: 779df3a3852830e74ae70e8520469c3bb03eb25b04cafaed7bc9ce548f789339

136 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://bologen.ru/award?keyword=messianic+passover+seder+script PDF link annotation
- https://static.s123-cdn-static.com/uploads/4375885/normal_6007dbf54a6da.pdfIn PDF document text
- https://cdn.sqhk.co/lamiwifa/fqB6voJ/jotanumepanitajudifeju.pdfIn PDF document text
- http://milanomoda.site/hallelujah_sheet_music_violadhgqh.pdfIn PDF document text
- http://ifeelgood.club/the_odyssey_part_2_study_guide50tpj.pdfIn PDF document text
- http://datekal.22web.org/8365603343.pdfIn PDF document text
- http://5coupon.info/63181926350weij2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4421624/normal_601b42801783e.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/xirixepo/milavofelubid.pdfIn PDF document text
- https://s3.amazonaws.com/buganabowumujef/alaiaron_bodo_song.pdfIn PDF document text
- https://s3.amazonaws.com/jazofi/videoder_apk_for_windows_10.pdfIn PDF document text
- https://s3.amazonaws.com/muwomapotumugi/abandono_escolar_causas_e_consequencias.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_off0000dd78.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD78	5100 bytes
SHA-256: `7403f155e19c30937d063bdf19b9a947d7a0b36029e08e63bbee7382dbf3c30b`
`font_01_sfnt_off0000eef1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEF1	10012 bytes
SHA-256: `28ed4ddab77bad9aa2d1b41d5de17d04a61376b829883ca9ce35ea091729f598`

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