PDF malware analysis — malicious · 6b2f2b11b9ec8a95

MALICIOUS

PDF

42.9 KB Created: 2020-11-06 05:42:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 8d36a4ebfafa6143180445d1e5046b28 SHA-1: d21a2862cf49a0f8c77d000ab3e8015d254d4e0a SHA-256: 6b2f2b11b9ec8a9525fc2c35b51c44cbc473a465cde48d6fb1cefccd097a2f09

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
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://trafftec.ru/strik?keyword=alcohol+boiling+point+trends PDF link annotation
- https://cdn-cms.f-static.net/uploads/4366003/normal_5f8746880d3cc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365612/normal_5fa062a41abc9.pdfIn PDF document text
- https://suludizivot.weebly.com/uploads/1/3/1/3/131383823/6813984.pdfIn PDF document text
- https://berajuvexoru.weebly.com/uploads/1/3/1/8/131860787/7e3d1.pdfIn PDF document text
- https://murikupa.weebly.com/uploads/1/3/4/4/134481598/e10edce227f9.pdfIn PDF document text
- https://gogiwujuduk.weebly.com/uploads/1/3/4/3/134352159/4267616.pdfIn PDF document text
- https://lerexujirizafet.weebly.com/uploads/1/3/4/3/134344290/9524661.pdfIn PDF document text
- https://tisatazufewuvo.weebly.com/uploads/1/3/1/1/131163687/fuvogogusagugo_waritep_pomaxusuvav_fepuve.pdfIn PDF document text
- https://voduzivesaduv.weebly.com/uploads/1/3/4/4/134456438/vajisimopu_waralum.pdfIn PDF document text
- https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/d8b4f785f.pdfIn PDF document text
- https://gugozakeku.weebly.com/uploads/1/3/4/5/134588211/c5e33920e992.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0505/1560/7716/files/96398884267.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0a8161ec-b0e1-4b61-ac74-5996ad89ddc6/tavamivefixoderazosirodo.pdfIn PDF document text
- https://s3.amazonaws.com/saxefi/chief_bandit_guide_mapleroyals.pdfIn PDF document text
- https://s3.amazonaws.com/xukonakefules/24457043899.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_off0000693a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x693A	5252 bytes
SHA-256: `937f80b55d5b2b910d9b46be86c4a4c2d8039858e3a8b6d80a397ecc95c53404`
`font_01_sfnt_off00007b0c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B0C	10604 bytes
SHA-256: `8c25c85bee72e70a4476dc7aa67c25dd9c6f45d63ac98bf50b2426e4e8232252`

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