PDF malware analysis — malicious · 2da903d0ad1711e3

MALICIOUS

PDF

78.9 KB Created: 2021-09-21 08:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 0a7048209bbbf1298a831458117d8d7e SHA-1: 2e267144f7639f3d4cb09d89a7b4fd6fbd740dda SHA-256: 2da903d0ad1711e3cceb236b701f431955c22ef8b69b3823994e6fb73dcba79f

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, many of which are structured as link farms. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to download a password-protected archive, a common tactic to evade gateway scanning. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://garglob.ru/uplcv?utm_term=password+hp+lupa PDF link annotation
- https://hinodanang.com/uploads/image/files/wupukur.pdfIn PDF document text
- https://openkomm.yussfone-crm.com/userfiles/file/gafidobegavi.pdfIn PDF document text
- http://gowowdeli.com/uploads/files/67891558636.pdfIn PDF document text
- http://www.amedna.com/userfiles/files/binevaw.pdfIn PDF document text
- http://clubselectionvoyages.com/images/file/43851079027.pdfIn PDF document text
- http://www.grupoaccs.net/ckfinder/userfiles/files/nemunonol.pdfIn PDF document text
- https://apsco.ly/userfiles/files/68162966708.pdfIn PDF document text
- http://urgentcarepb.net/userfiles/file/pobuboluwuzebuzob.pdfIn PDF document text
- http://cmi.nfe.go.th/ckfinder/userfiles/files/6070826493.pdfIn PDF document text
- http://indianspringhomes.net/userfiles/files/67436783503.pdfIn PDF document text
- https://suacuacuontoanphat.com/upload/files/xedogodivevanotepokekot.pdfIn PDF document text
- https://www.channeloflove.com/ckfinder/userfiles/files/walobodatunilusirideruxu.pdfIn PDF document text
- http://studioaba.net/userfiles/files/73637686445.pdfIn PDF document text
- http://ebsenglish.net/_UploadFile/Images/file/8672207272.pdfIn PDF document text
- http://elosc.com/upFile/file///ITX202109211019059206.pdfIn PDF document text
- https://vieclamlaocai.vn/webroot/img/files/wofixesakelinuluzujezi.pdfIn PDF document text
- http://omgmediatank.com/userfiles/files/92589503733.pdfIn PDF document text
- http://www.aragonemprendedor.com/userfiles/files/xadefitezogerivugutekotig.pdfIn PDF document text
- http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16141441d8e496---wonedojilavuwe.pdfIn PDF document text
- http://medob.org/SITE/files/editor/file/50779763356.pdfIn PDF document text
- https://labelmarket.pl/data/file/85188313068.pdfIn PDF document text
- https://tecnicadovolante.com/images/file/merokufuvupuvivegawu.pdfIn PDF document text
- https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/pj56msi9c8bm6l9ibsfnlgprpj/40808235552.pdfIn PDF document text
- http://etalentlink.com/uploadfile/file///2021091910213686.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_off0000d48a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD48A	10248 bytes
SHA-256: `606077413d158ba4fb89c7beecd7e4517752a66522d78b2d0a9bbfa0f1240f6d`
`font_01_sfnt_off0000ebbd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBBD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000103cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103CF	16348 bytes
SHA-256: `5c3f5e84fe039a2684cdb5191582902c5e0b4ac4a532cc8e7d831b2bd8c23966`

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