PDF malware analysis — malicious · ba06e574f0b8f548

MALICIOUS

PDF

82.1 KB Created: 2021-02-04 04:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 4244a9cbc83a1979ff56cadd6dcf6f38 SHA-1: 877f66c8cac9db4b349f5a7f0779887e6e81a10a SHA-256: ba06e574f0b8f54871b4c47387232b7f934124d57f4a79f12ffbb84ccc4522fd

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malware. The presence of a 'download button' heuristic further supports the lure-based attack pattern. While no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect users to malicious content, likely for payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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.
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://jottigo.ru/wb?keyword=my%20grandfather PDF link annotation
- http://kernig.pro/counter_strike_1._6_cd_hackg6t1c.pdfIn PDF document text
- https://pilonalamajavex.weebly.com/uploads/1/3/1/1/131164122/maludotofekujox.pdfIn PDF document text
- http://private-channel.site/bidufokidusufatobelitzsiy.pdfIn PDF document text
- http://socialwave.me/x-y_coordinate_plane_graph_paperaa7j3.pdfIn PDF document text
- https://xapenivivafozeb.weebly.com/uploads/1/3/1/3/131379266/neradogowikoko.pdfIn PDF document text
- https://xedasijaw.weebly.com/uploads/1/3/1/4/131453620/9e7a56c53463077.pdfIn PDF document text
- http://reduslim-italiaofficial.site/couple_ballet_dancersck83r.pdfIn PDF document text
- https://lekomuge.weebly.com/uploads/1/3/4/7/134773229/0aaa198.pdfIn PDF document text
- https://wefapewirevuvik.weebly.com/uploads/1/3/4/6/134667644/rokumipuvoguwa_rezurejenelevi.pdfIn PDF document text
- http://capridigi.com/jezilejawakonifepujoma6rkxg.pdfIn PDF document text
- https://fomodaduvi.weebly.com/uploads/1/3/4/7/134700625/4046915.pdfIn PDF document text
- https://reseviris.weebly.com/uploads/1/3/5/4/135400779/21ce624a88700c.pdfIn PDF document text
- https://baxopaparoxiw.weebly.com/uploads/1/3/1/4/131454316/rawonixalu.pdfIn PDF document text
- https://zuranuwazob.weebly.com/uploads/1/3/5/3/135332575/775107.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/leteraxewe/jagemipufurapumarugil.pdfIn PDF document text
- http://binuxusegewake.epizy.com/47922323104.pdfIn PDF document text
- https://s3.amazonaws.com/tokafanawa/tuvosofexitiri.pdfIn PDF document text
- https://s3.amazonaws.com/lanaladu/64689403732.pdfIn PDF document text
- https://s3.amazonaws.com/sepawi/kiwomemenafev.pdfIn PDF document text
- http://fawivemepogu.epizy.com/mekilivepasuniberasidapa.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e6f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6F2	4776 bytes
SHA-256: `7abf38fc759feb12abff7e32dee75e4c9817dbf7b4f6ea45e57736573b67a674`
`font_01_sfnt_off0000f7b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7B2	5620 bytes
SHA-256: `016623235923fb1d30311ba825dc7761a3731c24e536400546affa8c10a1db90`
`font_02_sfnt_off00010afa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AFA	13956 bytes
SHA-256: `5aef5f31139e13de034ed7331dde97f6bcd463af4a9cdbc123d30297a8476c5e`

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