PDF malware analysis — malicious · 5d67afc9f896da46

MALICIOUS

PDF

89.5 KB Created: 2021-09-16 21:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: e0b811d82806a831ab323b23bfe3e2c4 SHA-1: 1b987fe4f44f6cd1f39f6a68520ec2c506bef26d SHA-256: 5d67afc9f896da46a0df0339aa50482e21525b74e037312faf25b5fbd94f239b

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external URLs, many pointing to suspicious domains, suggests a link farm designed to redirect users to potentially harmful content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination or spread malicious links across many domains. No scripts were extracted, but the overall structure and URL distribution point towards a phishing or malware distribution lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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 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://pinkrali.com/calisma2/files/uploads/98961566789.pdf In PDF document text
- http://chuanghuilaw.com/filespath/files/20210909161723.pdfIn PDF document text
- http://beautybybelief.com/admin/images/file/49216513963.pdfIn PDF document text
- https://crc.creativechange.net/ckfinder/userfiles/files/rasupimorozore.pdfIn PDF document text
- http://refah4ter.info/basefile/hotelrefah4terir/files/milodomavas.pdfIn PDF document text
- http://liqaa-lb.com/files/userfiles/files/tivika.pdfIn PDF document text
- http://damnoen.com/ckfinder/pho/files/wapunopumesupaxozira.pdfIn PDF document text
- http://lenosada.sk/editor_uploads/files/waxogerukadowawunuji.pdfIn PDF document text
- http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe3a6715f6---sukatiji.pdfIn PDF document text
- http://box8websites.com/ckfinder/userfiles/files/40186258191.pdfIn PDF document text
- http://multiflex.ru/userfiles/file/20242858300.pdfIn PDF document text
- https://bdlvn.com/steel/upload/files/61768765394.pdfIn PDF document text
- https://accesoriosalmayor.com/images/userfiles/file/ratazodora.pdfIn PDF document text
- http://merrygoldholidays.com/ckfinder/userfiles/files/92046561564.pdfIn PDF document text
- https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/9ff4f24d2f6abdd2cb83f26d408be2e1/wuranuviwi.pdfIn PDF document text
- http://baodieptailor.com/uploads/2021-09-04/images/files/4097221596.pdfIn PDF document text
- http://www.workbythai.com/admin/assets/images/14360401622.pdfIn PDF document text
- http://rkenterprisesonline.com/FCKeditor/file/vibanetosoromagoruxepev.pdfIn PDF document text
- http://csc0516.com/userfiles/file/20210912231537_h1tnaa.pdfIn PDF document text
- http://emachn.com/data/attachment/file/62621717185.pdfIn PDF document text
- http://nj-rshb.com/v15/Upload/file/20219152019271658.pdfIn PDF document text
- https://njshore.drinkpoint.com/uploads/files/65001201914.pdfIn PDF document text
- http://bidwoodmachine.com/d/files/didepigapupebejusu.pdfIn PDF document text
- http://sziszolg.hu/editor_up/5411134004.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=read+injustice+2+onlinePDF link annotation
- 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_off0000fafa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAFA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011311.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11311	10660 bytes
SHA-256: `da0d85a709e4ae1e5584afe698af588e4ef03221416b09fa1cf168eb2005af36`
`font_02_sfnt_off00012b97.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B97	17268 bytes
SHA-256: `af2b6a16a777d9e23edae94910601937c9b0aa9d0c325d7f04df367be50b338f`

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