PDF malware analysis — malicious · dd4a74ddf3069ce7

MALICIOUS

PDF

91.1 KB Created: 2021-08-03 01:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 3a43e7bcda42b2184f7ba9c4d11d4cf9 SHA-1: 16fa923bf9b16391b28d5aade067db8a9fabf832 SHA-256: dd4a74ddf3069ce7bcc9aee8fcc81c55f892e7171f3b4727a739df8cdf86ef0a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9970

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://philabc.ru/uplcv?utm_term=what+is+the+comparative+and+superlative+form+of+the+word+clever PDF link annotation
- https://webvitamin.vn/app/webroot/uploads/files/gizaj.pdfIn PDF document text
- http://omak1968.com/clients/71178/File/21502859430.pdfIn PDF document text
- https://didacostruzioni.it/userfiles/file/67879483692.pdfIn PDF document text
- https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/9b17c4853c9aff86bd4aaf1dd7568550/22095351746.pdfIn PDF document text
- http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f5a220cb4---lubopimozonuziziwas.pdfIn PDF document text
- https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c87ddb56fde---nesowozasidimenuvunaja.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d294e82c00---813964487.pdfIn PDF document text
- https://hotel-la-licorne.fr/userfiles/file/36865133561.pdfIn PDF document text
- https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/89d6657d704783c1160ce7e75410471d/98924832792.pdfIn PDF document text
- http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079fe2107332---wolizivodadubimuvonasode.pdfIn PDF document text
- https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/587c1626514acb39bdfba4cc6ea2d431/91026026892.pdfIn PDF document text
- http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160993ac0760cb---68080843630.pdfIn PDF document text
- http://boxethai38.com/upload/file/pomozuzurixuwowa.pdfIn PDF document text
- https://jbdclothiers.net/emailer/userfiles/file/lisuxuwiwijetodulogelarez.pdfIn PDF document text
- http://martonaroniskola.net/userfiles/file/wonewikezoxe.pdfIn PDF document text
- https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/c8148392870270ec48a222b6d3164fa1/13184365458.pdfIn PDF document text
- https://micro-logic.ro/images/uploaded/file/5627352491.pdfIn PDF document text
- http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607699903aca0---wurorig.pdfIn PDF document text
- https://edu-mate.kr/_UploadFile/Images/file/15873328810.pdfIn PDF document text
- http://mobilesamara.com/img/files/file/22238183298.pdfIn PDF document text
- http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e69e63afc6b---43886111.pdfIn PDF document text
- http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075db71c498d---vofaz.pdfIn PDF document text
- http://hiddenforrest.net/clients/76790/File/fobubugotitejotutunun.pdfIn PDF document text
- https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/tfsdb9nn3ci7nv0lufuistrf07/vubuwabu.pdfIn PDF document text
- https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/jc11f93ac54huorkqtl7erdvvf/zedubewufageg.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_off0000f6bc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6BC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010ece.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10ECE	20456 bytes
SHA-256: `16e88d86dc7ee0e7d6ec67020594904afb6d96cf10a280bc9e8921ffc212e346`
`font_02_sfnt_off000142e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x142E4	11128 bytes
SHA-256: `9368f1939c8986cc483e633ecc660273efa50af2889ded6f7f054b4a615bf77e`

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