PDF malware analysis — malicious · 07046f2cf6797a57

MALICIOUS

PDF

83.5 KB Created: 2021-03-25 08:59:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 7a0ea7a1e838f2ddbee8b281ae0dfb79 SHA-1: 2acb9565c0fdc43757953a500766c71f2876345d SHA-256: 07046f2cf6797a57f8c6eb59106af74d043cd105f08ef5aa5bca3a84dee5ca12

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, 'midufefew.ru', which is likely used to host malicious content or facilitate phishing. The document body, though heavily obfuscated, suggests a lure related to 'business process improvement methodology'.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/strik?utm_term=what+is+business+process+improvement+methodology PDF link annotation
- https://static.s123-cdn-static.com/uploads/4426697/normal_5feb9aa539fbf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4459469/normal_605bf09ab4724.pdfIn PDF document text
- http://modezewop.mygamesonline.org/57794922046.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4464053/normal_6053c285c643c.pdfIn PDF document text
- https://cdn.sqhk.co/pesuxigu/x1rjj3g/fezununugekefibej.pdfIn PDF document text
- https://cdn.sqhk.co/limizolaxa/ij7VtVJ/mupikobudegirovewawaki.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4487423/normal_60134b999ef9d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424632/normal_5fdc47ba05e8a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4402737/normal_6003dadd6ba9f.pdfIn PDF document text
- https://cdn.sqhk.co/vezukefuza/bidVQic/party_city_locations_baltimore_md.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4487007/normal_6011a5de6651f.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/f902bf38-2c0c-4b48-8fed-99cc5d98f5ed/linear_functions_worksheet_algebra_2.pdfIn PDF document text
- http://futikuzita.onlinewebshop.net/tamenoseta.pdfIn PDF document text
- https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_4a8f2c7f8eb0453f8cc1ed96eb0aef13.pdf?index=trueIn PDF document text
- https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_2cd4103ddbc94142ae7b4880b33e414e.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/68bf9240-7794-4b5f-a60f-2608a66b525b/como_aprender_ingles_basico_rapido_y_facil.pdfIn PDF document text
- https://b133b025-67d1-4190-9e53-fbb99503dec2.filesusr.com/ugd/caf13f_cdf1d114291040aeb61acf86b1b65e1d.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/f1105043-cdfc-4902-8b3d-9280267d79a7/serigatexig.pdfIn PDF document text
- https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_9888333f23734a91b29974c3d81590a7.pdf?index=trueIn PDF document text
- https://b3709dad-42f4-4621-9b7e-74d31ca978cd.filesusr.com/ugd/f91cf1_5f4a3d899e0f4945824a8f0d566a88db.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f86c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF86C	5684 bytes
SHA-256: `859256c9d3834340b643a522fdd69805bc3725c47d7bbf8ac793296be3c24767`
`font_01_sfnt_off00010b95.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B95	10848 bytes
SHA-256: `b9e2ffcd0a1879ea9579f00ed75a305715722817ae5a078f3369da240143722e`
`font_02_sfnt_off00013061.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13061	4324 bytes
SHA-256: `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`

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