PDF malware analysis — malicious · 5e1e3d741ed62b4a

MALICIOUS

PDF

84.9 KB Created: 2021-07-07 01:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 0194225bcda9000ecde632e60bbd9924 SHA-1: 0fbe6c07062129e45c2649a228213c481db81d5e SHA-256: 5e1e3d741ed62b4a6bfbe09c25fae9d37bcb74d1ae32598f4e85517c1b121535

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains numerous links, many pointing to compromised WordPress sites hosting PDF files, suggesting a link farm or redirection mechanism. The presence of external URIs and a high ML score indicates a strong likelihood of malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160d77585df2fb---tizeko.pdf In PDF document text
- http://aarogyamedico.com/userfiles/file/javetodus.pdfIn PDF document text
- http://stattus.com/assets/file/83767019755.pdfIn PDF document text
- http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfe6045a9c---dewori.pdfIn PDF document text
- http://hotelgiottotorino.com/userfiles/files/zufurawitibuxidoz.pdfIn PDF document text
- http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160e0310fbb976---nalebegiwoxifizipidu.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b1e5db2a7---75315589905.pdfIn PDF document text
- https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607675d42c783---vemivuvarazojitora.pdfIn PDF document text
- http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c68f4076fdb---kasekaf.pdfIn PDF document text
- https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/65f3170de41b83066591951f88b0c77d/66313479359.pdfIn PDF document text
- https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/219dd571fcd21ace0f7f5902e3e70164/1070896795.pdfIn PDF document text
- https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/d3e3e0c065a5af24f36c8c35d687dbb1/49410474718.pdfIn PDF document text
- https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/125630egdafk8rmgpnidkbncn5/fubizunirukelub.pdfIn PDF document text
- http://timebymtm.com/upload/files/29061118422.pdfIn PDF document text
- http://studio70.eu/userfiles/files/mawujeg.pdfIn PDF document text
- https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1a6bcd045---kagulakaf.pdfIn PDF document text
- http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085b0a5e0171---93619019053.pdfIn PDF document text
- https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/7544418392267407a7d8d57413b8207d/18242019962.pdfIn PDF document text
- http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/pev0hivt1r1m5flr93oinkftq7/1294324164.pdfIn PDF document text
- http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c51c8a8c851---baxojoramubunoregate.pdfIn PDF document text
- https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ee01ecee3---zezikow.pdfIn PDF document text
- http://dailymaytrogiang.com/userfiles/files/58471454432.pdfIn PDF document text
- https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b08971f15c6---5767726633.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+delete+a+page+in+ms+wordPDF 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_off0000e899.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE899	16760 bytes
SHA-256: `641b3aba08ff74b729923ffe1654e1ceacc478b0397bc3f52b75c78a9b28172d`
`font_01_sfnt_off00011418.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11418	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012c2f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C2F	10812 bytes
SHA-256: `f5e93db71d801395acff6c5edd81e87371c83ef97fb50bf583331d67a5bd1913`

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