PDF malware analysis — malicious · 647fdfba22ed1b13

MALICIOUS

PDF

72.9 KB Created: 2021-09-10 05:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: fae3d3d157d8495525a5eec4917b3501 SHA-1: 1ad5e41cbe0691d972759a70e0df0707fe2a7535 SHA-256: 647fdfba22ed1b137734934225ccb177dc5787d2288acccf027d15e52f794e60

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and link farms, many hosted on potentially compromised or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://coretry.ru/uplcv?utm_term=private+number+on+android PDF link annotation
- https://pharmnet.cz/ckfiles/files/files/dajedejefidoselirut.pdfIn PDF document text
- https://aalatour.com/basefile/b2caalatourcom/files/81888857781.pdfIn PDF document text
- https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/78980f3209222984b99ea185c29ca62f/906233836.pdfIn PDF document text
- http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef16ae711d---wovigisumupixeminukeput.pdfIn PDF document text
- http://mtsp.by/userfiles/files/mevamuzifapiminug.pdfIn PDF document text
- http://www.afurg.com.br/assets/ckfinder/userfiles/files/21971575999.pdfIn PDF document text
- http://wideanglepackaging.com/ckfinder/userfiles/files/53248613490.pdfIn PDF document text
- http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe9adaba48---8710410481.pdfIn PDF document text
- https://singhaniabrothersltd.com/ckeditor/ckfinder/userfiles/files/27098162613.pdfIn PDF document text
- http://comp-art.ru/userfiles/file/laweb.pdfIn PDF document text
- https://eventaipei.com/upload/files/86859764398.pdfIn PDF document text
- http://dlugopis.kbo.pl/ckfinder/userfiles/files/23904114296.pdfIn PDF document text
- http://blgjad.com/upload/files/29261752349.pdfIn PDF document text
- http://theorientgarden.iorderfoods.com/uploads/files/68987117733.pdfIn PDF document text
- http://metisentry.net/ckfinder/userfiles/files/vegavojo.pdfIn PDF document text
- http://thaide.org/userfiles/file/79085579929.pdfIn PDF document text
- http://baracenter.be/userfiles/file/3998998076.pdfIn PDF document text
- http://www.ctnphrae.com/ckfinder/userfiles/files/56428211058.pdfIn PDF document text
- http://uniquecharacters.com/upload/files/47099838238.pdfIn PDF document text
- http://igabana.com/upfolder/e/files/20210906145159.pdfIn PDF document text
- https://nasco-ye.com/uploads/file/6084713753.pdfIn PDF document text
- https://deesudcoolingtower.com/userfiles/file/gafezo.pdfIn PDF document text
- http://ilovechardonnayhills.com/userimages/7709100886.pdfIn PDF document text
- https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/57c9ff1f0c950b97971a66c88765196f/57444754531.pdfIn PDF document text
- https://rafaellopezehijo.com/upload/files/75246061422.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_off0000bcf2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBCF2	10500 bytes
SHA-256: `1bd4829a4d0845efcc4f9c442d876907589ffbd3907b1ef37a169ad7670d2bbc`
`font_01_sfnt_off0000d4c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4C9	16084 bytes
SHA-256: `d096d0cb596a2aefdbf67ae4f2451cf03e79dab53a940a779e6c2119cdb98f68`
`font_02_sfnt_off0000fdbc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDBC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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