PDF malware analysis — malicious · 6adcff8757d9f0c9

MALICIOUS

PDF

82.4 KB Created: 2021-09-18 07:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: fa934d00a7bf5e8e042322f828aa3d97 SHA-1: a7d71944835805789142e5fcab0274d4d31e6103 SHA-256: 6adcff8757d9f0c946853f7c5a74055afb47487c1f38b8952422316a61c4eab3

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://ecableapp.com/FCKeditor/FCKimgUpload/file/90951376711.pdf In PDF document text
- http://minisadik-margaritka.ru/admin/ckfinder/userfiles/files/41654023211.pdfIn PDF document text
- http://italiangreyhound.pl/img1/userfiles/file/legorukazasajalitun.pdfIn PDF document text
- http://jeansresource.com/js/ckfinder/userfiles/files/49356753697.pdfIn PDF document text
- http://origo.ws/userfiles/file/58174479635.pdfIn PDF document text
- https://at1apigroup3.com/contents/files/vepoguvu.pdfIn PDF document text
- http://educasters.co/ckfinder/userfiles/files/47629537097.pdfIn PDF document text
- http://www.parinet.fi/tiedostot/files/wuvumi.pdfIn PDF document text
- https://kodcomputers.ro/2664/uploads/41918725662.pdfIn PDF document text
- https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/161438111730e0---xujibevogomorarosiz.pdfIn PDF document text
- https://grouptm2.com/contents/files/maxerezolegakotapifefivax.pdfIn PDF document text
- http://pegastelco.com/pictures/files/54299376574.pdfIn PDF document text
- http://aal.tw/uploads/htmlupload/files/81620212630.pdfIn PDF document text
- https://evermoral.hk/upload/file/1631430994.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/vipupexirolikabinawudazob.pdfIn PDF document text
- https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/5f6179c5de874348f130f3fc8f5dce77/37680954067.pdfIn PDF document text
- http://fabriquetextil.com/js/new/fckeditor/userfiles/file/vevifiwotipadarojozibojox.pdfIn PDF document text
- https://www.igescanada.com/ckfinder/userfiles/files/noxodaziwirofuxufoso.pdfIn PDF document text
- https://tnmkor.com/FileData/ckfinder/files/20210908_54202A8A568B2AD5.pdfIn PDF document text
- http://medicare-darmstadt.de/bilder/UserImages/file/29382100795.pdfIn PDF document text
- https://value.ae/userfiles/file/dinarewu.pdfIn PDF document text
- http://onfireinteriors.com/userfiles/11826760775.pdfIn PDF document text
- http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/45466275960.pdfIn PDF document text
- https://kingdomdatesuae.com/userfiles/files/zigedotu.pdfIn PDF document text
- http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16140306d6feca---8862605847.pdfIn PDF document text
- http://tuzy.pl/Upload/file/nivadogobisozujo.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=video+downloader+tiktok+no+watermark+apkPDF 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_off0000db92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB92	10532 bytes
SHA-256: `bf652486f12c86ed4cfbd15e76e1d03c4d4d530d1c7a45f441d955e96745d57d`
`font_01_sfnt_off0000f389.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF389	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010b9b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B9B	18476 bytes
SHA-256: `a6dd07a24450a8d1c0eee916e61efb00a3bf6dd636994ba39b52fb55584855b0`

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