PDF malware analysis — malicious · f1303b17047158d8

MALICIOUS

PDF

72.3 KB Created: 2021-02-28 09:31:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04

MD5: a1c5e6f662a66e181edbdb7db4b5f197 SHA-1: 5b3c82d9f487d43dd2268eac1be11a9a99558704 SHA-256: f1303b17047158d8c6005f195cd010baa31200c280c5594b1ee88afad4b84514

136 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://golowaki.ru/wix?keyword=btd5+hacked+unblocked+7788 PDF link annotation
- http://xemizawufogutuf.scienceontheweb.net/vamumexilu.pdfIn PDF document text
- https://cdn.sqhk.co/remigalakefo/9AXhb2x/shell_h2_simulation.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4387712/normal_5fee455a34e52.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4478946/normal_5ff66e8ced222.pdfIn PDF document text
- https://cdn.sqhk.co/susopavazane/7UhfheX/walking_dead_finale_spoilers.pdfIn PDF document text
- https://cdn.sqhk.co/vulovosovem/QhcjbBN/funfair_ride_simulator_4_obb.pdfIn PDF document text
- http://gefosezidubajoz.scienceontheweb.net/najowi.pdfIn PDF document text
- https://cdn.sqhk.co/vixukose/hajfidl/fikiregixibijijal.pdfIn PDF document text
- https://cdn.sqhk.co/gediwuwanol/hiQeihq/lebunijok.pdfIn PDF document text
- http://trastqort.online/24480749045w0kpc.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://genufewewirim.rf.gd/app_that_answers_history_questions.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_off0000ddd7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDD7	5404 bytes
SHA-256: `d9a8df83ed4cefe27af272bbad10902ab334bfb5a180812a530b9b34e136e3cb`
`font_01_sfnt_off0000f043.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF043	10704 bytes
SHA-256: `6e7dfa1deb06b1cfce1f4322ac86b533d7b47665cab275eab04c80ae44b29877`

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