PDF malware analysis — malicious · 4390079e8cf1eeaa

MALICIOUS

PDF

84.9 KB Created: 2021-03-14 22:24:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 182816c8fd9ece7b8dc6dff303d1773f SHA-1: e8acc3429bb3fae307735be96582813b99a886d1 SHA-256: 4390079e8cf1eeaa49e7bb4dd256f9d74444383c4af250b53f6ba3abd23922dc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or a method to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the presence of numerous external URLs suggests the document's primary purpose is to redirect users to potentially harmful sites.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://ponafet.ru/strik?utm_term=funny+for+dummies+books+list PDF link annotation
- https://cdn-cms.f-static.net/uploads/4497356/normal_600b0085661ea.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4376382/normal_5fcb66d17d4aa.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460066/normal_600ecde65435d.pdfIn PDF document text
- https://mifopubulu.weebly.com/uploads/1/3/1/6/131637027/gexevizeled_roretudixorupu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4452837/normal_604ab97996885.pdfIn PDF document text
- https://nofuzibid.weebly.com/uploads/1/3/1/4/131453406/xinipiradewi.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4447273/normal_5fc9048c1c5d0.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://18aefb47-0221-41c7-ace0-4f78eb33e730.filesusr.com/ugd/bca722_5d14797b44d54c2f9c9bbfb728cf6dbb.pdf?index=trueIn PDF document text
- https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_86606f8d69ea4da2a90c33322b6f6efc.pdf?index=trueIn PDF document text
- https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_f5776e76565840d29634a11d80a3f442.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/mubemutolewe/booting_process_in_computer.pdfIn PDF document text
- https://52a1af19-6946-4c37-aba6-ab00a30e4874.filesusr.com/ugd/5dc3ca_aac68c4c6da74d99b18d72f26b8167b2.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/jamuluvuvava/ramilejepi.pdfIn PDF document text
- https://s3.amazonaws.com/xakusineba/product_end_of_life_notification_template.pdfIn PDF document text
- https://s3.amazonaws.com/bejeseja/39871469432.pdfIn PDF document text
- https://s3.amazonaws.com/novipaliwid/18775265463.pdfIn PDF document text
- https://a4edf7fa-b057-49b5-8014-e5fd436fbef3.filesusr.com/ugd/c8b2c5_2c0373603f654c929931210a8a2c2f74.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/satudifin/98198007157.pdfIn PDF document text
- https://bea00909-aa88-4d38-ac88-e56db460b486.filesusr.com/ugd/923104_45bce6d85927494d86b2403485138316.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/dalava/42271533829.pdfIn PDF document text
- https://s3.amazonaws.com/gogoxowiniza/gibizawi.pdfIn PDF document text
- https://s3.amazonaws.com/ruzaganog/11220035694.pdfIn PDF document text
- https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_48835117e41345fea96873d68278111b.pdf?index=trueIn PDF document text
- https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_637ad32350c84e1d82d3d5af2bf0d5cb.pdf?index=trueIn PDF document text
- https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_771cb49c337545ef9a5d0a456351e807.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_off00010c5d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C5D	5104 bytes
SHA-256: `91adcdbb22811e79e726e986d4f58f9830a34db49d6f8bec29baa3c4546bfba4`
`font_01_sfnt_off00011db6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DB6	11532 bytes
SHA-256: `910830e664ac6ad50f08f4b059f18b89174eaa03c0ae6bffb16582c5b0aa1e59`

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