PDF malware analysis — malicious · 11c25fdc6dfb5b9a

MALICIOUS

PDF

81.6 KB Created: 2021-03-15 02:57:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 58987d590cfea85460adf069ee8004d2 SHA-1: 99c590750c2c73521419a33c5045f81529d66c10 SHA-256: 11c25fdc6dfb5b9a236033c1628e59ff49ce18407730b79528bab2f6913bed10

186 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 disposable domains, indicating a link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URL 'https://soxebez.ru/strik?utm_term=how+to+hook+up+mackie+mixer+to+speakers' is likely part of a phishing or malware distribution scheme, disguised as a search result.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/strik?utm_term=how+to+hook+up+mackie+mixer+to+speakers PDF link annotation
- http://vehicleinsusa.com/daily_life_of_a_serf_in_medieval_europe2yu5f.pdfIn PDF document text
- http://wdd13.ru/dungeons_and_dragons_dice_bag3uz20.pdfIn PDF document text
- http://makedctl.site/77404976424zk3p4.pdfIn PDF document text
- https://xanifinutevafux.weebly.com/uploads/1/3/0/7/130739814/didanox-xemowi.pdfIn PDF document text
- https://cdn.sqhk.co/jonolamojof/mQhPDhj/14843939010.pdfIn PDF document text
- https://dowamodugepaxa.weebly.com/uploads/1/3/0/7/130739159/5560233.pdfIn PDF document text
- https://cdn.sqhk.co/mafomawoxali/Fgjicha/15310603864.pdfIn PDF document text
- http://saxozumipelezip.22web.org/70058993154.pdfIn PDF document text
- http://fakaripeti.xyz/naming_3d_shapes_worksheetsz10w3.pdfIn PDF document text
- http://zoxatejisiv.22web.org/xogatugu.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://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_f5fa01e89f034345807531331eb125f4.pdf?index=trueIn PDF document text
- https://89511c73-251b-4bee-a1a5-5f4bd4863124.filesusr.com/ugd/f24cb8_dd2af58f12fb413b9d4e3acbb295be4b.pdf?index=trueIn PDF document text
- https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_3b1fbe83a4794006bcdf5de02abbb4a7.pdf?index=trueIn PDF document text
- http://pekilorusixeduj.rf.gd/how_to_learn_phrasal_verbs_in_hindi.pdfIn PDF document text
- https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_5ae4ecb9893f43aebaa10331f0001632.pdf?index=trueIn PDF document text
- http://beganiwalegujas.rf.gd/que_son_monosacaridos.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b6060d26-bb92-467a-88c8-3d48e782fb7d/12585417507.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d2871ff0-06ea-4856-a999-910b52b52a84/wugabuzarunamidegekeduxon.pdfIn PDF document text
- http://koperevipifonib.rf.gd/how_to_know_iphone_motherboard_problem.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_off0000f316.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF316	5104 bytes
SHA-256: `733b9de3a52faa57764d3c6a900e0a58a05e9045d22fca3c73c09397003dbcc7`
`font_01_sfnt_off00010484.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10484	11224 bytes
SHA-256: `4a7d72aa9b86c2a7514b80640a426bdb6f721935974e6fa381a65d25645b870f`
`font_02_sfnt_off00012a7e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A7E	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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