PDF malware analysis — malicious · 59dcf7754c87f9b1

MALICIOUS

PDF

86.5 KB Created: 2021-06-30 04:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 088b26c6b0d7970158f993b4fbde17bf SHA-1: a33f8cf00f5f0a244fd13c806ff52caeb07e5078 SHA-256: 59dcf7754c87f9b1392fc5e401413f7b771e7f0e77b107ac447f26b125f1d4ed

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous links to compromised or disposable hosting sites, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attack pattern designed to exploit user trust.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://nguyenhungstone.com/uploads/image/files/fijijubipasotizajirew.pdf In PDF document text
- https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/6c3b072e7b8e05903b981e75812fd0ca/94892106341.pdfIn PDF document text
- http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12bfb540fd---fejon.pdfIn PDF document text
- https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989ee3639b6---79568703108.pdfIn PDF document text
- https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc301bd9c7---zekifajerok.pdfIn PDF document text
- https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/84b2c0cdd1de24a07b87e24cdc87f712/faxobepagogopujopivar.pdfIn PDF document text
- http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/7n14odgdv2rb5iisoie7mhtrb1/maxisejaporejinukufora.pdfIn PDF document text
- http://burattinojatek.hu/userfiles/file/47685742886.pdfIn PDF document text
- https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee95b95cd1---42474191148.pdfIn PDF document text
- https://michelbarbot.com/upload/files/buziguxalegigi.pdfIn PDF document text
- http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083249888311---83202782757.pdfIn PDF document text
- https://searchlink.org/userfiles//file/25360988892.pdfIn PDF document text
- http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5da28ae9b---libiwubaxo.pdfIn PDF document text
- http://ekotronic.eu/files/file/gudepemovumalelufipiwowu.pdfIn PDF document text
- https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/d9bd8ae5c67be54a455f2b2aa29b8a5a/xukadofinoma.pdfIn PDF document text
- http://tks-forever.com/upload/2021/06/19/file/gobagogu.pdfIn PDF document text
- http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d748ce85743---wumel.pdfIn PDF document text
- http://ildungrice.com/fileupload/fckeditor/file/75737363804.pdfIn PDF document text
- https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/uqg6509i4ra6boa8ftoer9bj01/merosinunog.pdfIn PDF document text
- http://xboxheerlen.nl/userfiles/file/novewix.pdfIn PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/bed4ad54438c4f9f3c1c95717c36b012/bogebumolutije.pdfIn PDF document text
- http://bidmitt.com/img/files/file/13191126782.pdfIn PDF document text
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607caa6a9fd39---julusiwotolovugeriwote.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=principles+of+design+worksheet+answersPDF link annotation
- http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48b74314ae---ragujozofuwetalasude.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_off0000ec13.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC13	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001042a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1042A	11080 bytes
SHA-256: `3746d538dfabd1fa5ba8e23012e539f3df9736c6fc6dcd8140ee382ae2f5abaf`
`font_02_sfnt_off00011dc2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DC2	17624 bytes
SHA-256: `1997106d4e11cc85ef1431d8e493c8de25b675ce7820d6ef3b6792ac93d18876`

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