PDF malware analysis — malicious · a50f317278e034e4

MALICIOUS

PDF

78.4 KB Created: 2021-04-04 20:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 9824bf5afc6f34457ecc89f1ee8af263 SHA-1: 3c240a90e0e3cc0be5bba45b27e9cd6055bc5ff2 SHA-256: a50f317278e034e4576b346dd19d6a81491281d605b5292f4a627a3aab778350

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's part of a PDF link farm. The primary malicious URL, https://botokaw.ru/123?utm_term=fssai+annual+return+form+d2+online, is likely used to direct users to further malicious content. The presence of numerous external links suggests a phishing or SEO-based attack vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://botokaw.ru/123?utm_term=fssai+annual+return+form+d2+online PDF link annotation
- https://vejejalerejoji.weebly.com/uploads/1/3/4/6/134600164/af23b39485.pdfIn PDF document text
- https://maxojemuv.weebly.com/uploads/1/3/4/2/134266220/94ef5dda1.pdfIn PDF document text
- https://gafewifem.weebly.com/uploads/1/3/1/3/131379815/jujesibalaror.pdfIn PDF document text
- https://betetaguzom.weebly.com/uploads/1/3/2/3/132303315/cec0df615b4f.pdfIn PDF document text
- https://siraxaroxaran.weebly.com/uploads/1/3/1/4/131483069/7466326.pdfIn PDF document text
- https://fuwupizur.weebly.com/uploads/1/3/5/3/135390256/xarubeviwerix.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_0d5dee39e54f4f36b82ecb0e65c7be76.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/sorogamat/battlefield_2142_free_pc.pdfIn PDF document text
- https://s3.amazonaws.com/vesubodufisi/jatejuwuruwofufavitovev.pdfIn PDF document text
- https://d992f69e-bc5b-430a-92d7-abfd66d0380b.filesusr.com/ugd/6f7357_e9eadfca986c4bb4853bf642c1839460.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/pusolefosex/mini_cooper_maintenance_costs.pdfIn PDF document text
- https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_b81d63ffc53c4539a061fc644b7bd03b.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/furunumaroxun/bose_solo_5_universal_remote_manual.pdfIn PDF document text
- https://s3.amazonaws.com/lowebemuwojiso/labujaponivaviratewuka.pdfIn PDF document text
- https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_b7561c5a258c4dabab9820d18ca4a35d.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/baxunaf/fesoxapafugibexigafapojil.pdfIn PDF document text
- https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_88de361d46f34365bf96a720fd578fd8.pdf?index=trueIn PDF document text
- https://7e6b698e-d56f-4a21-8c48-787e2f6d39f4.filesusr.com/ugd/7836c9_b0e04896ba134286b8b60373d31cef48.pdf?index=trueIn PDF document text
- https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_23cd35acabc34a02900e1debadb26411.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/jifesu/chordal_action_in_chain_drive.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_off0000f698.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF698	5140 bytes
SHA-256: `17d19d9e04b02c4c1d88148ee86a994553cd31a38059725d5f661abbce68ff3a`
`font_01_sfnt_off000107f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107F8	10832 bytes
SHA-256: `00e6422f055422383fa91f0ce2fa9a3cb59ef1a1be0d4bc304a64fc8ec28740e`

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