PDF malware analysis — malicious · 5be9ea742bc3f645

MALICIOUS

PDF

77.8 KB Created: 2021-05-25 13:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: bf0507c891c46e619b87f507c3e112c2 SHA-1: 240e3f2e3a28f6d897405474ccc6f30f12834f2a SHA-256: 5be9ea742bc3f645a883f9fc4a691bb67d442a57314598d53515aebf91bf8a25

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, indicative of a link farm or phishing infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially malicious content, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

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.
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/strik?utm_term=modelo+de+encuestas+de+satisfaccion+del+cliente+pdf PDF link annotation
- https://fizokufewof.weebly.com/uploads/1/3/4/0/134096090/d1923d9.pdfIn PDF document text
- https://wifevotus.weebly.com/uploads/1/3/4/8/134897576/3030508.pdfIn PDF document text
- https://fevapeju.weebly.com/uploads/1/3/4/4/134468187/lenetexiwabuwupo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4411701/normal_60694becab2d1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4410965/normal_604e175c14e15.pdfIn PDF document text
- https://punotajevi.weebly.com/uploads/1/3/4/2/134266109/safagemi_gumes_bubek.pdfIn PDF document text
- https://nulupuro.weebly.com/uploads/1/3/4/5/134596779/e78073.pdfIn PDF document text
- https://pitulero.weebly.com/uploads/1/3/2/6/132683003/sigigekiwuposex.pdfIn PDF document text
- https://ruloxewetufo.weebly.com/uploads/1/3/1/1/131164393/vubikizudatuv.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4453336/normal_6005d60a417a6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4488817/normal_605cf670164ad.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
- https://s3.amazonaws.com/fidefofudi/skype_for_business_desktop_client_mac.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9755ae85-bc55-4148-8d78-6fffe4b156c5/what_message_does_the_nurse_have_for_romeo.pdfIn PDF document text
- https://s3.amazonaws.com/miledu/why_isnt_my_frigidaire_ice_maker_working.pdfIn PDF document text
- https://s3.amazonaws.com/jawusawar/xofajenogenijipelerinim.pdfIn PDF document text
- https://s3.amazonaws.com/dudigonifu/bivosalulofakogik.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/51f8bef1-1b94-403d-9eeb-bd2f725899fe/middle_smithfield_presbyterian_church_east_stroudsburg_pa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f7886a0f-a649-41e3-b6fc-0cf35163d314/10456739086.pdfIn PDF document text
- https://s3.amazonaws.com/pazerogasarinu/31027187948.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_off0000e5da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5DA	4940 bytes
SHA-256: `9fb25f967b8408e3269e50f2bc60ac248cbff7fdb4ef2a1027df07eaac515306`
`font_01_sfnt_off0000f6c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6C1	11200 bytes
SHA-256: `8690f6ff6d16d5b0fbe7ff0eb4d7587fc6d8796ab779c32b532b83375aa410a5`
`font_02_sfnt_off00011b2a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B2A	4324 bytes
SHA-256: `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`

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