PDF malware analysis — malicious · 351776daf0fbbee7

MALICIOUS

PDF

81.6 KB Created: 2021-09-17 11:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 620bfb1ea68aa3ed43ea8e7eedeaf4ac SHA-1: 3ca4e4104d2e48f5c27d647357877020a9d9f698 SHA-256: 351776daf0fbbee7503ba84bac0a68413cd46d78cf4f58200e380b1fbcb6f5d8

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains numerous external URIs, including one pointing to a raw IP address, suggesting it acts as a lure to external malicious sites. The PDF structure and embedded content indicate it's likely part of a phishing campaign or a downloader for further malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

Heuristics 6

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL

PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
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://inwebjor.ru/uplcv?utm_term=words+that+start+with+c+and+end+with+g PDF link annotation
- http://www.dfdtrading.sk/ckfinder/userfiles/files/seseduvojoxadukuzopigejar.pdfIn PDF document text
- https://delphin-bau.com/ckfinder/upload/files/lamorisululatugebut.pdfIn PDF document text
- https://dhesient.com/media/66091271339.pdfIn PDF document text
- http://dulichtantai.com/files/uploaded/files/jolepemavisorido.pdfIn PDF document text
- https://robertbah.si/files/file/26345041376.pdfIn PDF document text
- https://juraganmonyet.com/contents/files/doxebidejugogatejir.pdfIn PDF document text
- http://sicilyontable.it/userfiles/files/37359030851.pdfIn PDF document text
- https://vyrukrc.lt/userfiles/file/pamedetonunivevulesagop.pdfIn PDF document text
- https://doellefjelde-mussemarked.dk/images/newsmail/file/xegepulavozamil.pdfIn PDF document text
- http://businessvaluationapp.com/fck_files/file/97435822337.pdfIn PDF document text
- http://ecole.ru/text/images/file/putifux.pdfIn PDF document text
- http://vtvxm.vn/userfiles/file/jisexalagapepoboretegi.pdfIn PDF document text
- https://ibshospitals.com/userfiles/file/pinebugufepavixowebo.pdfIn PDF document text
- http://notariocprietoa.com/notaria/documentos/files/mujakidigexoroxiwu.pdfIn PDF document text
- http://maslatalaia.com/userfiles/file/zimonerowubinuluxewavebo.pdfIn PDF document text
- http://banghetretruc.com/media/ftp/file/fimumalonubitifogelopavo.pdfIn PDF document text
- https://autotronics.vn/userfiles/file/8010197715.pdfIn PDF document text
- http://handgun.ee/media/file/zutijaduneruralesiduwowa.pdfIn PDF document text
- http://kccmaul.com/files/files/pigedogewuguguwezatoboda.pdfIn PDF document text
- http://jl-vacuum.com/upload/files/mizekokaki.pdfIn PDF document text
- http://185.33.116.145/~acus01/upload/files/sedimowibajumagal.pdfPDF link annotation
- http://quatangsongvan.com/hinhanh_fckeditor/file/70451847170.pdfIn PDF document text
- http://marisqueandopremios.com/campannas/file/robaxe.pdfIn PDF document text
- http://e1pl2.nazwa.pl/busy/fotki/file/80635315982.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d87a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD87A	18620 bytes
SHA-256: `0d12683280fddf6b63e3b6a18754ab8d04d89a09512d5607104f52f99a4b7cef`
`font_01_sfnt_off000108a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108A4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000120bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120BB	10684 bytes
SHA-256: `4d20baf35ef65cb8d947304dfb183d19072cbe6e95bcd3a1f984d7e2ed03ef20`

Open this report in the interactive analyzer, or submit your own file for analysis.