PDF malware analysis — malicious · 400bc0e4d2ae0137

MALICIOUS

PDF

76.6 KB Created: 2021-02-25 02:43:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20

MD5: 071f7ee2cf32caf978b6502cae8ab718 SHA-1: 6f86f02e549b827927bca1e419b8fd41e6a46461 SHA-256: 400bc0e4d2ae0137737cbe7a1961a951bbd7150f6e0489aa8d357fc632158f09

226 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document is classified as malicious and exhibits characteristics of a remote support tool lure. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The document's structure and heuristic firings indicate it is intended to trick users into installing or connecting with remote support software, likely to gain unauthorized access or deploy further malware. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

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.
Remote-support tool lure high SE_REMOTE_SUPPORT_LURE

Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
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://bologen.ru/wb?keyword=how%20to%20turn%20off%20rca%20tablet PDF link annotation
- https://purolitawi.weebly.com/uploads/1/3/4/8/134894903/18981.pdfIn PDF document text
- https://mopebewugo.weebly.com/uploads/1/3/0/7/130776026/gujerejenus_basemesonumi_gufibufexi.pdfIn PDF document text
- https://gadudomarun.weebly.com/uploads/1/3/4/7/134705140/fipetefa-tijenike.pdfIn PDF document text
- https://nagaleburanab.weebly.com/uploads/1/3/4/3/134379557/mubadorefo.pdfIn PDF document text
- https://povobaza.weebly.com/uploads/1/3/4/3/134383372/6178732.pdfIn PDF document text
- https://vejikawotepux.weebly.com/uploads/1/3/4/8/134887167/sunoniner.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420430/normal_601e486703401.pdfIn PDF document text
- https://lutapusudifo.weebly.com/uploads/1/3/1/0/131070527/feluxon.pdfIn PDF document text
- https://xomilazarega.weebly.com/uploads/1/3/4/5/134511507/biwulu.pdfIn PDF document text
- https://giduzuzetedeze.weebly.com/uploads/1/3/4/8/134853145/6089341.pdfIn PDF document text
- https://pakunifa.weebly.com/uploads/1/3/5/3/135307874/1150825.pdfIn PDF document text
- https://tokafiwunan.weebly.com/uploads/1/3/4/3/134372509/vavozakupij.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4451045/normal_602d766c46ffa.pdfIn PDF document text
- https://mexukisigugat.weebly.com/uploads/1/3/4/7/134702857/dosek.pdfIn PDF document text
- https://kasorewo.weebly.com/uploads/1/3/2/7/132740312/wiwiwavipolu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457868/normal_5fd78cc848656.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://nerepigov.rf.gd/42659590193.pdfIn PDF document text
- http://fopaguduvogo.rf.gd/attagasam_video_songs_in_isaimini.pdfIn PDF document text
- http://fozovevozasox.epizy.com/kasusulu.pdfIn PDF document text
- http://xajetizefo.rf.gd/67284139070.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_off0000eec9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEC9	4888 bytes
SHA-256: `81c9518123fd657e350f9de5291810074547a819e1c168af7f0eaebcfba15e38`
`font_01_sfnt_off0000ff8c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF8C	10916 bytes
SHA-256: `a8205cc3657a5bc1c0ee8aa410d1f9570f466fde3a60cc7848a79ddbbd58428e`

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