PDF malware analysis — malicious · 11a434e9405e0338

MALICIOUS

PDF

80.0 KB Created: 2021-09-17 11:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 08cee350454e6a2d7287103d84433ce8 SHA-1: cdfd3f16240b7931e52c66cd79a006042ee161c8 SHA-256: 11a434e9405e0338649df3cfd5d78a125fb515ee2aa1e61ff24c0a86114b3140

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://pistant.ru/uplcv?utm_term=jinde+meriye+parmish+verma+full+movie PDF link annotation
- http://mamnonkitty.com/webroot/img/posts/files/mofagozuwimut.pdfIn PDF document text
- https://riolisboa.com/images/ul_files/file/R9E3bvXKApZ1.pdfIn PDF document text
- https://petpetmates.com/files/editor/file/ledezorexutazonodajamag.pdfIn PDF document text
- http://piscesappliances.com/userfiles/file/89857481953.pdfIn PDF document text
- http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5f68338c6---62407758559.pdfIn PDF document text
- http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/seruwa.pdfIn PDF document text
- http://jszl-rolls.com/filespath/files/20210909212425.pdfIn PDF document text
- http://jr-bang.com/uploadfiles/20210906110210.pdfIn PDF document text
- http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131ab5aa42ad---nejilago.pdfIn PDF document text
- http://mayinmaunhat.com/upload/files/raxijuzel.pdfIn PDF document text
- http://baruraprotidin.com/assets/ckfinder/core/connector/php/uploads/files/ratonudofafibaselibajoda.pdfIn PDF document text
- https://holycrosshealthcare.com/userfiles/files/1621018859.pdfIn PDF document text
- https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/240e903917db34a803d4644b3be7fd9a/48878722143.pdfIn PDF document text
- http://azizavacanze.com/userfiles/files/modibulivesifipig.pdfIn PDF document text
- http://carscaso.com/js/upload/files/51244373402.pdfIn PDF document text
- http://psychanalyste-gard.fr/ckfinder/userfiles/files/xemibegitikazu.pdfIn PDF document text
- http://faurerom.com/userfiles/file/nawejegegakug.pdfIn PDF document text
- http://xiangzhuan.tw/upload/files/muvifosa.pdfIn PDF document text
- https://majubesar.org/contents/files/8738268951.pdfIn PDF document text
- http://prmakeup.com/Image/files/53065107673.pdfIn PDF document text
- https://mosaicopeoplecorporation.com/ckfinder/userfiles/files/85469461096.pdfIn PDF document text
- https://used-machinetools.ro/app/webroot/files/userfiles/files/8114387787.pdfIn PDF document text
- http://parkingparts.com/Upfiles/file/59622934654.pdfIn PDF document text
- https://interstudy.net/userfiles/file/lonemifepazu.pdfIn PDF document text
- http://www.vandiestbrandstoffen.be/uploads/files/84162641946.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_off0000d448.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD448	17316 bytes
SHA-256: `36d6821cdddc296ba15d60a30cb8d335be634add184d602ea5c41163c2f81d8d`
`font_01_sfnt_off00010113.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10113	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001192a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1192A	10936 bytes
SHA-256: `6fdc74da35cc99dbf465acb6e9d1380cb328a30265df3ee74e2e3b516fec2b1c`

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