PDF malware analysis — malicious · dccf006f2dcdc9fc

MALICIOUS

PDF

87.3 KB Created: 2021-07-03 04:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 968d4b065aec1ac0a18a72a994b31ac3 SHA-1: de75b78d256a1a65c455cd2e7632c1f0ddf2480c SHA-256: dccf006f2dcdc9fcd2b615c636c7f9ba9323fd63344ad25cc70b762e8b2a73c0

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links pointing to compromised WordPress sites, indicating it functions as a link farm. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs suggests a high likelihood of directing users to malicious content or phishing pages. No scripts were extracted, but the structure itself is indicative of a malicious distribution or redirection attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 5

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://crewmak.ru/uplcv?utm_term=download+english+amharic+dictionary+for+pc PDF link annotation
- https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b4300cd40fc---55231831745.pdfIn PDF document text
- http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/84965d26801e494c5718a56c92832ea3/nikuzikijugadubu.pdfIn PDF document text
- https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bb50afa8f---42599138083.pdfIn PDF document text
- https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab7ad61c20---56344365312.pdfIn PDF document text
- https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/cvmkalss8pg7m0csv9bgb7cnei/69085800842.pdfIn PDF document text
- http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/839cfef4ce517f7032b9a46371612e0e/94699384414.pdfIn PDF document text
- https://groupunsur1.com/contents//files/birowizikipugeraf.pdfIn PDF document text
- https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5a5b52eb7---disizenojasejirenev.pdfIn PDF document text
- http://dothanhigh1970.com/clients/6/63/63ba8bdc6fdca46b25bb56d5732eafc9/File/tagobabituki.pdfIn PDF document text
- https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/7a138cc7e8513e384d6913d039618d56/58504278010.pdfIn PDF document text
- http://museeducuir.org/upload/files/vagizakitibotewil.pdfIn PDF document text
- http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c6380b85d90---sukazafifebod.pdfIn PDF document text
- http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8b951345f---fibadavalodetetovigar.pdfIn PDF document text
- https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a0b37f789---gikibawuzasokosobawej.pdfIn PDF document text
- https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/5d9246b8ecb7a42deec8f9ce94f7773d/tokerugerukamagolu.pdfIn PDF document text
- http://inlovehuahin.com/file_media/file_image/file/23149601926.pdfIn PDF document text
- https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/2vsjlci4q49l5gjj4kqmt91dhl/91922841654.pdfIn PDF document text
- http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607746e34efb8---51698520452.pdfIn PDF document text
- https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa5ef0db2c---fuvejupiroxawutijufiroxa.pdfIn PDF document text
- http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084783a6dfe8---vevejizumuzadodenuxetonis.pdfIn PDF document text
- https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/6c77dc5e4899166cbf60fb48fdce1e0d/gegulobepi.pdfIn PDF document text
- http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b375d1e3ee7---22806452783.pdfIn PDF document text
- https://puppometalli.eu/file/lutezurizokapekonobixidis.pdfIn PDF document text
- https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/e6e4210ffeaa16fc8263d0cc2ffa7448/81920319277.pdfIn PDF document text
- http://wadirumshootingstars.com/userfiles/file///51151915307.pdfIn PDF document text
- http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ccf5d9a50b---32340000794.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_off0000ef67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF67	17520 bytes
SHA-256: `25eda8cb1400c4c0b67574601ecefb959e9338e1a169de797ba7298144a1b863`
`font_01_sfnt_off00011d7e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D7E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013595.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13595	11268 bytes
SHA-256: `e77e4cd035266029a9a821ad79a815eb8b12c312823121d0de45ce390b8a306e`

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