PDF malware analysis — malicious · 5504d0fb2360c3ec

MALICIOUS

PDF

81.3 KB Created: 2021-03-21 05:00:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: e44ed9e0c3e6e885bb536c4907eb2afc SHA-1: bbe5cd21521e1f5d3311c24a58aa38f8f8f92f47 SHA-256: 5504d0fb2360c3ec3140a9f8e986f035a1a39ec2eebc781e9bffd4daf17028ff

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm for SEO manipulation or to distribute further malicious content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 6

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.
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://baarspo.ru/wix?keyword=ulrich+stern+cosplay PDF link annotation
- https://vipefujalebir.weebly.com/uploads/1/3/4/7/134744486/wedajimusaludigase.pdfIn PDF document text
- http://nudistoff.club/dalivejupetozuzeg5yxk.pdfIn PDF document text
- https://cdn.sqhk.co/gadewekunel/Mjejgjj/coin_hunter_50p.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4480173/normal_602d663a56753.pdfIn PDF document text
- http://connexion-amelii.xyz/how_much_does_a_finishing_carpenter_makeb385s.pdfIn PDF document text
- https://bifuwesulowun.weebly.com/uploads/1/3/4/3/134308915/jifitela_jemidudejovuf_dubuvimumike.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4493917/normal_6010226c916e5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4448976/normal_6022d88d28e7c.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4378619/normal_5fe18834f06f0.pdfIn PDF document text
- http://itprod.space/rikapawovc4sse.pdfIn PDF document text
- https://cdn.sqhk.co/lufelumad/gEDjdav/39637988433.pdfIn PDF document text
- https://tufanemoxidubux.weebly.com/uploads/1/3/4/3/134315727/nikogukezaforisada.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417423/normal_60434d0b530bc.pdfIn PDF document text
- https://cdn.sqhk.co/tudusiki/bWVohaw/nixosureku.pdfIn PDF document text
- https://cdn.sqhk.co/lebexuzo/TG9gfic/dead_cells_update_history.pdfIn PDF document text
- https://torevoxun.weebly.com/uploads/1/3/2/7/132712334/ragomubiwu-raterax-xeninegenokesax.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4390643/normal_5fd79deae53be.pdfIn PDF document text
- https://kenofina.weebly.com/uploads/1/3/5/2/135295682/dazetoxufid.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4474222/normal_5fe4cdc423aae.pdfIn PDF document text
- https://cdn.sqhk.co/pivokazi/DEkigha/55607588009.pdfIn PDF document text
- https://giwemonuxir.weebly.com/uploads/1/3/0/7/130775654/3712011.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4484612/normal_604a792db7e42.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
- 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_off0000f2d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2D2	4904 bytes
SHA-256: `f2eaff47add74fa749933b022822e47922b730a2155cfcaadc295eae19be093e`
`font_01_sfnt_off0001036a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1036A	11984 bytes
SHA-256: `db161b8095dc2dff9dfbdc75f876d660728363bfcfc579a241ac2b2552c78529`
`font_02_sfnt_off000129e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x129E2	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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