PDF malware analysis — malicious · 3e122859f04e8d97

MALICIOUS

PDF

73.3 KB Created: 2021-09-17 06:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: a878105216816bc6fd63f3cd90b316f8 SHA-1: 39b6d85cb7412ba3905ac2e83a8e2fc5f618f4b4 SHA-256: 3e122859f04e8d97b0a1ef2fa7e4c3889db9790b6b6154d4133afa42c74a666e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating phishing and trojan activity. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content or phishing sites. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/bd61b3438bb8c14b62c3cd9ae60681e9/60150133815.pdf In PDF document text
- https://hantverkarenisandby.se/UserFiles/files/76748532306.pdfIn PDF document text
- http://mobilahomedesign.com/userfiles/files/6077070976.pdfIn PDF document text
- http://koryosushi.com/uploads/files/gitumokekonumuma.pdfIn PDF document text
- https://telorgabus.com/contents/files/xafevidumejodenesuro.pdfIn PDF document text
- http://dush-kz.ru/uploads/fck/file/69094806476.pdfIn PDF document text
- http://www.salpasafarit.fi/tiedostot/files/pijonuni.pdfIn PDF document text
- https://univerosg.com/ckfinder/userfiles/files/putubifiri.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c859bf7d4---ruxekiwanetaxofuz.pdfIn PDF document text
- https://pankajplast.com/ckfinder/userfiles/files/5657789646.pdfIn PDF document text
- https://adesso-moosburg.de/images/file/nuvuma.pdfIn PDF document text
- http://ski-experience-japan.com/images/blog/file/13287653195.pdfIn PDF document text
- http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138870de247e---tigek.pdfIn PDF document text
- https://thegioidongphuc.net/ckfinder/userfiles/files/1316808809.pdfIn PDF document text
- http://alde-pace.org/ckfinder/userfiles/files/55817310174.pdfIn PDF document text
- http://burragebrothers.org/demo/jolie/beta/userfiles/files/likomena.pdfIn PDF document text
- https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16140c3e3a35a6---dofun.pdfIn PDF document text
- http://acelybio.com/upload/files/vutevaxigenokokatapaniri.pdfIn PDF document text
- https://sharpconsulting.us/app/webroot/ckfinder/userfiles/files/mozipakilulo.pdfIn PDF document text
- http://wish-pharma.com/upload/files/1078159028.pdfIn PDF document text
- http://frickcontrols.com/uploads/files/5638394408.pdfIn PDF document text
- https://genegurumiraclehealer.com/userfiles/file/4107352944.pdfIn PDF document text
- https://goacetours.com/ckfinder/userfiles/files/15520784049.pdfIn PDF document text
- http://sriagasthiyarastro.com/FCKeditor/userfiles/file/79451830335.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=live+net+tv+for+mxq+pro+4kPDF 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_off0000bd7e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBD7E	10584 bytes
SHA-256: `74e4b564a8e8ca05c1fee68052be82eb3eb85cfc853b88d3342790053043e7ce`
`font_01_sfnt_off0000d5b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD5B1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000edc3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDC3	16488 bytes
SHA-256: `3f6980c6e7404cebc7ae336be5397f80a329613be6119e29b596e156537d3982`

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