PDF malware analysis — malicious · 5c422ccf884ebc5b

MALICIOUS

PDF

66.8 KB Created: 2021-02-26 01:25:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-31

MD5: fb7c8295ac803b1e33ec512927d848aa SHA-1: 25f85a35cff469cbc18415313cf435a339ee3159 SHA-256: 5c422ccf884ebc5b14ed5de958f68fe6884eeb65d4cd6e9cde589c483917d5a7

136 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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=kindle+fire+hd7+4th+generation+case PDF link annotation
- https://cdn.sqhk.co/xegigujatefa/fieQofD/56850400241.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4388611/normal_600577dd1e5f0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4489844/normal_5fe9ee5c1a4fd.pdfIn PDF document text
- https://cdn.sqhk.co/zumedizojas/ejhjgjB/11411038152.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4417137/normal_5ff5f10d6d72a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4402940/normal_5fd1140badcaa.pdfIn PDF document text
- http://banquepopulaire-fr.org/33997449787xa9zz.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/wofaxil/71513014184.pdfIn PDF document text
- https://s3.amazonaws.com/kewakuko/99308138409.pdfIn PDF document text
- http://pusapovewazigu.onlinewebshop.net/list_of_218_phrasal_verbs_translated_in_french.pdfIn PDF document text
- https://s3.amazonaws.com/legipalofi/45781622503.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_off0000c61a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC61A	5420 bytes
SHA-256: `9124b8e0924e99ede3cf72adfed26311332f67e7a970e71fb7d6563dd7c4ad93`
`font_01_sfnt_off0000d894.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD894	10544 bytes
SHA-256: `4fae5367205020cac1d52de0609e7a343319adfa9a55cf5a7f8cc22ff44d6e38`

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