PDF malware analysis — malicious · d9dc1870457a5e8d

MALICIOUS

PDF

105.4 KB Created: 2021-06-27 05:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 048b79bd1c028d508e33cb084e7e05a7 SHA-1: 077a54fee12ad0da0c447537fa6ca55a2e4dacb7 SHA-256: d9dc1870457a5e8df8f814c971ccf20d3c71b7750cece0a01c9162f7df13ee3b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Several heuristics point to the PDF acting as a link farm, directing users to compromised WordPress sites hosting further malicious content. The presence of multiple URLs hosted on compromised CMS upload directories suggests a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9773

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.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c74ef2d6317---95852642812.pdf In PDF document text
- http://linuxnewyork.com/draft/media//88994540600.pdfIn PDF document text
- https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b51d7fbd83a---43296399495.pdfIn PDF document text
- http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c73f4be28---girasetuf.pdfIn PDF document text
- https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/c9de98fad5009d7d2689a76a24b47267/woxabidijogebubimapiro.pdfIn PDF document text
- http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/jibolarapa.pdfIn PDF document text
- http://krevue.cz/UserFiles/File/rovupuwasatogokigifuten.pdfIn PDF document text
- http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f10c424dc2---gaberigegov.pdfIn PDF document text
- http://mygotour.com/FileData/ckfinder/files/20210530_10C7613AD0C91197.pdfIn PDF document text
- https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/608dd1d8121d517ce2b9277dc2c91684/81078672710.pdfIn PDF document text
- http://nsdadventist.org/FCKData/file/tujonokigoguza.pdfIn PDF document text
- http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607a22943e447---burituvag.pdfIn PDF document text
- http://sotel-perm.ru/site/file/binizefedafed.pdfIn PDF document text
- https://bikidi.com/UpFiles/WebEditorFiles/file/22701046077.pdfIn PDF document text
- http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf986a0185---xepewowami.pdfIn PDF document text
- https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800d75c7c5b---29039231404.pdfIn PDF document text
- https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f3e2bd4fd---54493404025.pdfIn PDF document text
- https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/915781090750cc9b74a7e7688b19ef5c/desujugimo.pdfIn PDF document text
- https://angelsstaff.com/uploads/file/19788526159.pdfIn PDF document text
- https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/caead74ad232f489f0d1a30d016de2a6/38171041214.pdfIn PDF document text
- https://alkalacarservice.com/public_html/userfiles/file/16230556997.pdfIn PDF document text
- http://sarljarry.fr/userfiles/file/nizezepuvitidoxa.pdfIn PDF document text
- https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/4aee64f3aa8382adcd0d8e2edf2d04d6/64350045912.pdfIn PDF document text
- http://ascensionchina.com/userfiles/file/19514964795.pdfIn PDF document text
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070c893830eb---13278555179.pdfIn PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607f43542235f---71453856786.pdfIn PDF document text
- http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6f9a0a268---kagibugidupizupe.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+many+obtuse+angles+in+a+pentagonPDF 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_off0001324d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1324D	19896 bytes
SHA-256: `1890cd871b2e0a1fa46b49d3b5acbd6f9a29dfbfa5eda45854c2666f0e6aeeca`
`font_01_sfnt_off000167ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x167EE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00018005.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18005	10928 bytes
SHA-256: `635b32090b660426b375aeb91a517b0eb25bf9ff2a2868ab9227eb2520d7e4f2`

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