PDF malware analysis — malicious · b2bc982451cde55e

MALICIOUS

PDF

83.5 KB Created: 2021-07-05 19:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 2cf55d9058ce4a5a9cb111be5bcaddec SHA-1: 6abe391537356c5fc5c60da04048b889ab0f75b7 SHA-256: b2bc982451cde55e4e78051734a033af6ad03f4eeee5bf86df57df2c684ced8e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to disguise or track redirection to malicious content.

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 http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16093f646b8ff4---71604363839.pdf In PDF document text
- https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd863c7e84a---17757411152.pdfIn PDF document text
- https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/mojbrg6rh3haotpql7f1el0afe/23039012149.pdfIn PDF document text
- https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a652ba7f60---begazid.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42dd296dcb---13614452214.pdfIn PDF document text
- http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5d001e95c---julidiv.pdfIn PDF document text
- http://grafichesirio.com/userfiles/files/1593120065.pdfIn PDF document text
- https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/39e30e3b1eccc758a738ae7a01d35de9/86233380606.pdfIn PDF document text
- https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/8e98250498c2defc09357d4432793b68/daduxexe.pdfIn PDF document text
- http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f416e4dd5f---65154186429.pdfIn PDF document text
- https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160df593166bbf---rovubonas.pdfIn PDF document text
- http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078a88d374f8---88682981587.pdfIn PDF document text
- http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e7ea237d6---40730853127.pdfIn PDF document text
- https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/ef5a48e954ae8fdd1e532625c687d276/97255317306.pdfIn PDF document text
- https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/7c0279a2428d1f40643020d4c257534f/83482936982.pdfIn PDF document text
- http://www.deopendeur.org/imgUser/file/3885771069.pdfIn PDF document text
- http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/h38ea99ooiqslqakmre0upg6c0/85487330219.pdfIn PDF document text
- https://lotteppta.com/beta/assets/file/48248920940.pdfIn PDF document text
- https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f72a24f14---38847807658.pdfIn PDF document text
- https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/okaq3o38pi3devv36v7orpnmjo/tufigagemuxumuporabogupit.pdfIn PDF document text
- http://bhttourist.com/upload/fckimagesfile/xufataxutuna.pdfIn PDF document text
- http://www.cenlaenvironmental.com/siteuploads/editorimg/file/4547983870.pdfIn PDF document text
- http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b3fb37437---kadoninilugomifosanolelar.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=subject+object+pronouns+possessive+adjectives+exercisesPDF 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_off0000e3e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3E1	11072 bytes
SHA-256: `05bcab4cc8a70ea9078d11917fa213a894dc9376934836f60b47e7ff54f41f67`
`font_01_sfnt_off0000fd98.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD98	16624 bytes
SHA-256: `a45f2846be7407d5d22348e668cf4ebc5d5c2d23757d23ca7e99931dc3518519`
`font_02_sfnt_off0001289a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1289A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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