PDF malware analysis — malicious · ea75615cb247ff95

MALICIOUS

PDF

73.0 KB Created: 2021-02-28 03:38:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04

MD5: 3d237017692dd237359cd0652c7c3852 SHA-1: 5fafe28653cbc62a0f812923855abeaea8abc780 SHA-256: ea75615cb247ff95c49fa2a48aa27847dea1f8eddf1e030f24b5fb81d926f1c6

136 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://gimoguvi.ru/wix?keyword=membrane+structure+and+function+answers PDF link annotation
- https://cdn-cms.f-static.net/uploads/4425926/normal_602d62e6a2d38.pdfIn PDF document text
- https://pabarasoziraw.weebly.com/uploads/1/3/5/3/135324669/b8dace93db.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4501193/normal_5fd771f95749a.pdfIn PDF document text
- https://cdn.sqhk.co/nulegudup/Kfhdzgi/billy_bunch_auctions.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4451035/normal_5fdc6b0e27dd5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4372963/normal_5fc60ce89df04.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/vibuvomomuv/alemtuzumab_package_insert.pdfIn PDF document text
- https://s3.amazonaws.com/bisapovepizaj/bible_free_apk.pdfIn PDF document text
- http://bojisunizinop.epizy.com/berubonepemi.pdfIn PDF document text
- https://s3.amazonaws.com/wejuvono/tegosufafijanexaki.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_off0000e21f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE21F	5372 bytes
SHA-256: `88a33366c78830e5b63b92456d009d92f65c5093ab156fba23c79c3994de933f`
`font_01_sfnt_off0000f462.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF462	10148 bytes
SHA-256: `e7bcfc6e0934e920022a5188a3b225948e0a3e7b554d8d3ed06c736171ac0d16`

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