PDF malware analysis — malicious · af21b981c2ae15ff

MALICIOUS

PDF

462.0 KB Created: 2022-02-07 12:21:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-21

MD5: db0a2baa566d955686d523e662fb0d50 SHA-1: db238c5082957665c9c9aeed82757ea4dd424db5 SHA-256: af21b981c2ae15fff49bdaf743055a47c7b01ad6baf8575ff9e8c16d97c3a8d8

166 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.5375

Heuristics 6

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.
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://norin.co.za/XSRYdR1H?utm_term=collage+art+app PDF link annotation
- http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611367b42a47e---72252171865.pdfIn PDF document text
- http://brno-skoleni.cz/ckfinder/userfiles/files/nozajitupububafab.pdfIn PDF document text
- http://vaness-sens.fr/ckfinder/userfiles/files/rilisisomas.pdfIn PDF document text
- https://samsunyapi.com/userfiles/files/zakovekulogivusosowalub.pdfIn PDF document text
- https://www.medicalbi.com/ckfinder/userfiles/files/60201727855.pdfIn PDF document text
- https://synodradomski.pl/userfiles/file/49338960249.pdfIn PDF document text
- https://butyfarm.mm520.net/userfiles/files/bazuruvet.pdfIn PDF document text
- http://htwy.com/upload/file/8571442607.pdfIn PDF document text
- http://aktifithalat.com/resimlerfiles/bigiviruribob.pdfIn PDF document text
- http://dogable.de/userfiles/file/16576962028.pdfIn PDF document text
- http://veoguidecostarica.com/ci/userfiles/files/jaxufizugunu.pdfIn PDF document text
- http://bakefruit.com/uploads/files/202108161149171881.pdfIn PDF document text
- http://conserviabd.com/assets/ckeditor/kcfinder/upload/files/18476759761.pdfIn PDF document text
- http://angel-conference.org/upload_fck/file/2021-11-24/20211124070233991496.pdfIn PDF document text
- http://pc75.net/upfiles/file/1626097121.pdfIn PDF document text
- http://batteryzone.pk/assets/kcfinder/upload/files/dolimujagudabevonugupogu.pdfIn PDF document text
- https://oldalunk.hu/userimages/files/rekovadenefojidavigenulo.pdfIn PDF document text
- https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/1ac7c52a87cd2858f0b53ee6d4235638/69580122584.pdfIn PDF document text
- https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1612ae057a8223---nixibavexo.pdfIn PDF document text
- http://feriaalainversa.com/uploaded/files/86452545426.pdfIn PDF document text
- https://unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/78898982434.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0006cda1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CDA1	10092 bytes
SHA-256: `78cadbb1341848d6ba50cb0521cb8057e9d557bdb6816efb85c5f8550b74206a`
`font_01_sfnt_off0006e44e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6E44E	16560 bytes
SHA-256: `924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9`
`font_02_sfnt_off0006fb69.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FB69	17636 bytes
SHA-256: `6c7038238e49ff6df9a20111edf5f183472c8c6d9b61f7aeabd860607ce9e7db`

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