PDF malware analysis — malicious · 38ca50ba2d187e01

MALICIOUS

PDF

81.8 KB Created: 2021-09-01 13:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 24e3b1aacfc281d633e9bdf56617196f SHA-1: 4b5a407513db5b35d34e503da4b7b11a78a13aa8 SHA-256: 38ca50ba2d187e01a4a8230931b56a9c90bf9c27703cc81f10d2cb3771ad9c60

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. These links likely serve as a link farm to redirect users to malicious content, such as phishing pages or malware downloads. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9944

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://allytemp.ru/uplcv?utm_term=diners+drive+ins+and+dives+trinidad+food PDF link annotation
- https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078575958809---34677526125.pdfIn PDF document text
- http://chipmax.in/chipmax/ckfinder/userfiles/files/15147121845.pdfIn PDF document text
- http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609223afedf0b---36275745967.pdfIn PDF document text
- https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/877336075e8b72b8b173274487e68bb3/vokomobukoxatutojik.pdfIn PDF document text
- https://adikkeempat.com/contents//files/bijixekunevexogerefuka.pdfIn PDF document text
- https://nedimgame.com/calisma2/files/uploads/jovopopebewoposidigemi.pdfIn PDF document text
- http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611166d23e85e---89530833587.pdfIn PDF document text
- https://theatresaucinema.fr/uploads/file/wexawunenesiletilenej.pdfIn PDF document text
- https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/07e161f77317352fa8876ba88cc5c22c/46025629465.pdfIn PDF document text
- https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/610a496a958eee5f861804a7a030b956/wefelojozugimatuninuxe.pdfIn PDF document text
- http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d1086b8e3---bikulekaridebuno.pdfIn PDF document text
- https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/aacf14fdbcc18391819b1f74ac4ca2ee/28579111521.pdfIn PDF document text
- http://dobrejaja.com/Upload/file/75888238305.pdfIn PDF document text
- http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/dc91lohpi23upljhp00uhoumn3/60890015381.pdfIn PDF document text
- http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f46e8e1b40---57767501111.pdfIn PDF document text
- http://retailcop.ca/files/29213174399.pdfIn PDF document text
- http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b5fe812f6c7---rikododoniguw.pdfIn PDF document text
- https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/8aa180923a4f61af4502e902484ed915/sexasepoviked.pdfIn PDF document text
- http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca190989bce---5638442475.pdfIn PDF document text
- http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16077e0bfc0d74---2509007050.pdfIn PDF document text
- http://crm333.com/documentos/file/jitunojokijaluvukotikibu.pdfIn PDF document text
- https://ekaplast.site/admin/ckfinder/userfiles/files/26299521463.pdfIn PDF document text
- https://fishboat.hr/files/xowajazozefesasikifal.pdfIn PDF document text
- https://j26clean.com/upload/files/4670485756.pdfIn PDF document text
- https://85097781.com/upload/files/pimafirani.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/bc6887249918871037d8cbbe0c1f1b74/godatiberabon.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_off0000d8b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8B7	10368 bytes
SHA-256: `2ed8a3f80d125d1d648d9f2c111ce44f1e6c3d4cb544b1137c97bb4121ee354b`
`font_01_sfnt_off0000f052.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF052	17944 bytes
SHA-256: `ba414194a4ce46036899948cb5f7d9d3c40a6c161620060ea1441373aa21921e`
`font_02_sfnt_off00011edf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11EDF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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