PDF malware analysis — malicious · 1e65087e9a46cf72

MALICIOUS

PDF

78.1 KB Created: 2021-04-04 06:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02

MD5: 87d7dd40d7f5650ad60c333c83c6e4a3 SHA-1: 9c3fd585812757e0e0e71a183f55e9f6464ded70 SHA-256: 1e65087e9a46cf7237a2879b3c370b9538f990f5953de896e187b30fd570fe9e

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous external URIs, with one prominent URL pointing to 'https://baarspo.ru/wix?keyword=city+of+oshkosh+personal+property+tax', suggesting a phishing or scam attempt disguised as a search result. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://baarspo.ru/wix?keyword=city+of+oshkosh+personal+property+tax PDF link annotation
- https://cdn-cms.f-static.net/uploads/4403820/normal_602cd6f35233c.pdfIn PDF document text
- http://nawitebexu.medianewsonline.com/cursive_alphabet_practice_sheets.pdfIn PDF document text
- http://vizilirudigub.getenjoyment.net/conjunction_test_with_answers.pdfIn PDF document text
- http://zonizubiro.getenjoyment.net/15133626638.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465924/normal_5fe7f79b7d6f0.pdfIn PDF document text
- http://mokaxizekebade.scienceontheweb.net/19955677481.pdfIn PDF document text
- http://wuxetij.mypressonline.com/vabefapafanub.pdfIn PDF document text
- https://vegirizekor.weebly.com/uploads/1/3/1/4/131407876/8e9c7e580545.pdfIn PDF document text
- https://kefomituwo.weebly.com/uploads/1/3/2/8/132815939/9575415.pdfIn PDF document text
- https://sobapeseg.weebly.com/uploads/1/3/1/0/131070394/2e991779323.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4477386/normal_5fff6629d465b.pdfIn PDF document text
- http://sowopezamiw.medianewsonline.com/bruce_lee_book_tao_of_jeet_kune_do.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4466140/normal_6056e5d8e8743.pdfIn PDF document text
- http://mitimewigupito.mypressonline.com/ridepuzesisofo.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/2814f6ac-ae09-4c07-8698-17f67bfaf99e/koruvuzisatexewojurabuwu.pdfIn PDF document text
- http://mepitar.atwebpages.com/safe_agile_principles.pdfIn PDF document text
- https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_2bafc26566d84fffab6a01f9a61607e3.pdf?index=trueIn PDF document text
- https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_0d3ce21fbca544489a979e40a261147e.pdf?index=trueIn PDF document text
- https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_4b450bdd4b3f4507b63d2b570c9b5ebf.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/421b3dd4-13c7-4d44-9798-de2c0c5f9179/frasi_chiusura_lettera_inglese.pdfIn PDF document text
- https://30d6ba4c-d201-4e26-8f31-a0e059b28788.filesusr.com/ugd/f9b8bb_7f37de074a0449df83083378d088ca2a.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/cfab8c42-747a-4348-86dc-1a09852d2db6/85907387512.pdfIn PDF document text
- https://43e59f28-96d7-4988-bcd6-55bc25f76e69.filesusr.com/ugd/372bdc_a744487a4e4f447b9cb95abb590b72e4.pdf?index=trueIn 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_off0000f25a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF25A	5128 bytes
SHA-256: `e8b45abeff0b6ee79f2af155dfb62663f00f5667d5c52221041f21cb1466845b`
`font_01_sfnt_off000103d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103D2	11376 bytes
SHA-256: `70d2546f25dc2c2a36eca1cd1c3c3be8e2001ea907daea90419defbfc6e715c7`

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