PDF malware analysis — malicious · 6a07f13007c8f6e5

MALICIOUS

PDF

85.4 KB Created: 2021-09-01 00:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: ed95079891c93fb0b0b71600e9478145 SHA-1: d2a1eb410afdf1626b46bc56e8dab376bd76623c SHA-256: 6a07f13007c8f6e546847647aac1163018d67aa8a04230a4bdd6f77a70a7c68b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document contains numerous links pointing to compromised websites and disposable hosting, characteristic of a link farm used for SEO manipulation or to redirect users to malicious content. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to lead the user to external malicious resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

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://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5b30c3e9f---dokegig.pdf In PDF document text
- http://cbestdesign.com/ckfinder/images_store/files/1176299381.pdfIn PDF document text
- http://asiadomainstore.com/userfiles/file/80668691011.pdfIn PDF document text
- http://ledseoul.com/userData/board/file/58054712290.pdfIn PDF document text
- http://www.blueoak.fr/image/file/1605669984.pdfIn PDF document text
- http://sooclose.eu/upload/File/95080238195.pdfIn PDF document text
- https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/053970fe5831b86de8a0ec87f08a9620/72643050623.pdfIn PDF document text
- http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611be33f212bb---kusolebe.pdfIn PDF document text
- https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/9533jq1jt7u20n27gbjiftqpk5/5846336327.pdfIn PDF document text
- http://aucoindeshalles.fr/menu/file/71606940657.pdfIn PDF document text
- http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612478a697950---80222334038.pdfIn PDF document text
- https://ecoverservice.be/gallery/file/93259181766.pdfIn PDF document text
- https://pergamine.com/ckfinder/userfiles/files/zukaxalu.pdfIn PDF document text
- http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210627234453.pdfIn PDF document text
- http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612acef51422d---parerot.pdfIn PDF document text
- http://dyccpharma.com/upload/files/nixivajulogidupazarato.pdfIn PDF document text
- http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b72e971873a---nibivudetulovugolamav.pdfIn PDF document text
- http://alanurturizm.com/rsm/files/92914018971.pdfIn PDF document text
- https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16091967eb5e45---57981862572.pdfIn PDF document text
- https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/6c9f20b84502a5b76301a6e7cf442ccc/71833050329.pdfIn PDF document text
- https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/wisidofoxemupokemaledogip.pdfIn PDF document text
- http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5840679e23---14371993159.pdfIn PDF document text
- https://soudurelauziere.com/upload/editor/file/76251375733.pdfIn PDF document text
- https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/6d323aaa6a9fe204c19948db83c634cc/jisosuzuxopuveg.pdfIn PDF document text
- https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/a71a0m14hoo2sq06k5givlq5ja/juxepujiside.pdfIn PDF document text
- http://hgbs.de/userfiles/file/50995570333.pdfIn PDF document text
- https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/i4qqmvg6t32kg0l0qsp0auca88/nudubodimatufajugitu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=power+of+attorney+attestationPDF 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_off0000e985.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE985	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010197.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10197	18084 bytes
SHA-256: `bc5b8a8ec6c53949ec0a939ec85bef96b222c877bb0f10c9fd4c37ae80540408`
`font_02_sfnt_off00013030.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13030	10364 bytes
SHA-256: `5e1fd9039378bf5308b5934addad0492fbf0d413ae31feafeed5ef91fc8aedac`

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