PDF malware analysis — malicious · 2b3f7fa0c6f46712

MALICIOUS

PDF

81.9 KB Created: 2021-09-12 15:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 3d5146f6782da89aff91fbf8f1258267 SHA-1: 052983286b1c42805c8651344cd5677f16a5f420 SHA-256: 2b3f7fa0c6f467126ba988b8b06493f5b68eddfa04f6170f43be0448bc61aacc

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous links pointing to compromised or disposable domains, indicative of a phishing or scam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious websites for credential harvesting or malware distribution. The presence of embedded JavaScript, while not directly executed in this static analysis, is a common technique for obfuscating malicious links or initiating further malicious actions.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

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://catamma.ru/uplcv?utm_term=mbll+diamond+hack PDF link annotation
- http://sys-svinding.dk/userfiles/file/vudowagozot.pdfIn PDF document text
- http://medicalproduct.hu/images/files/999266662.pdfIn PDF document text
- http://fortwashington.abwingsmd.com/uploads/files/41815008095.pdfIn PDF document text
- http://www.idukkidiocese.org/files/js/ckfinder/userfiles/files/povejimuja.pdfIn PDF document text
- http://jafra-com.at/userfiles/file/32520943947.pdfIn PDF document text
- http://www.jucadent.es/ckfinder/userfiles/files/13954251683.pdfIn PDF document text
- http://ambulatorioveterinarioilprato.eu/userfiles/files/pafuvipiwuroxisujop.pdfIn PDF document text
- http://conganbacgiang.vn/app/webroot/uploads/files/zonojisom.pdfIn PDF document text
- http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/161316b5bb1fa4---48011855911.pdfIn PDF document text
- http://www.leposeur.fr/site/upload/ckfinder/files/dupapipofisanevifirevaves.pdfIn PDF document text
- https://drnanemilk.com/tctt/sites/aaa/file/vavupofesuwez.pdfIn PDF document text
- https://jpt.mysmartedu.com/uploadimages/files/19445221632.pdfIn PDF document text
- http://tradotel-riviera.com/file/2053807519.pdfIn PDF document text
- http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa6d3a1257---2638285336.pdfIn PDF document text
- https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/9752df98223fd9cd0c60d7f11f2341a2/52726483883.pdfIn PDF document text
- http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/4t9it2njoljp1u3rv5snavg7e6/7038601870.pdfIn PDF document text
- https://edgecs.com/documents/xijunevixipuwopuvegiza.pdfIn PDF document text
- http://dintainoodle.com/uploads/files/46629241620.pdfIn PDF document text
- http://bigbazar.cz/is/images/FCKeditor/File/kanedojorekovaridom.pdfIn PDF document text
- https://meesens.be/KrMee/Tekstverwerker/34029362274.pdfIn PDF document text
- https://amgaa.org/temp/files/65502335760.pdfIn PDF document text
- http://tlumacz-bialystok.pl/pliki/file/nivagamujivad.pdfIn PDF document text
- https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/161366bff85c15---73998169569.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_off0000dc94.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC94	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f4a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4A6	18176 bytes
SHA-256: `70d66e9218e068673c809248ac8e7f2b2277cf26aae83a8e87ee34808bc78bf1`
`font_02_sfnt_off0001231b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1231B	10364 bytes
SHA-256: `b7d02b2ca06da34da01956e60f63d0d7888a98c5eb8e6752640c6e31da98c7f5`

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