PDF malware analysis — malicious · 46f2f54cb1851533

MALICIOUS

PDF

75.8 KB Created: 2021-09-17 07:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: d743f1a6644f0a027386e8a7e1b53ea1 SHA-1: f6922b3aa8ae99ca2d22c0402d7ee7c73e0082c6 SHA-256: 46f2f54cb1851533aa2c092ef7ae18bdf5b21872fcc7a71e8e6f8c2a9be62c91

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate a pattern of using these links to distribute malicious content. The embedded JavaScript likely facilitates the redirection to these malicious sites, contributing to a phishing or malware distribution attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://inwebjor.ru/uplcv?utm_term=super+retro+snes+apk PDF link annotation
- http://capitolmetrophysicaltherapy.com/files/files/taburusuvirunuda.pdfIn PDF document text
- http://lsbwg.com/ckfinder/userfiles/files/20210910/1930573589.pdfIn PDF document text
- http://arc-en-cielproduce.com/ckfinder/userfiles/files/mebuvimusikoverufu.pdfIn PDF document text
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/mjcq0dij97843k17bdd8lqnvo4/74870816457.pdfIn PDF document text
- http://www.malagatour.es/ckfinder/userfiles/files/tamakisewavitepi.pdfIn PDF document text
- http://datacomsystems.cz/userfiles/file/vunutoguwop.pdfIn PDF document text
- http://huarui-bio.com/upload/files/tenevabamubelabivupi.pdfIn PDF document text
- https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394d521193e---vawepavepinog.pdfIn PDF document text
- http://porpora.biz/imagenes/imagenes_contenidos///gadixixoxobuperuj.pdfIn PDF document text
- http://myphammonly.com/luutru/files/zupamegolugumowuwifo.pdfIn PDF document text
- https://didaktika.drmix.cz/uploads/files/xisunosuroxesarubotawuna.pdfIn PDF document text
- http://megalabsrl.it/userfiles/files/56315413709.pdfIn PDF document text
- https://e-tta.com/app/webroot/userfiles/files/13738193937.pdfIn PDF document text
- https://hotnews.md/upload/userfiles/files/15420399148.pdfIn PDF document text
- https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/53bd86276f6f048d5f408446cdaf1318/33064175799.pdfIn PDF document text
- http://abwingssuffolk1.com/uploads/files/9128123458.pdfIn PDF document text
- http://ux02.wadhost.com/js/ckfinder/userfiles/files/fapujagaripoxipunugov.pdfIn PDF document text
- https://inprovitperu.com/ckfinder/userfiles/files/10749576142.pdfIn PDF document text
- https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/416b76fb47ebd8ebeb96660f9abda3a3/50078021939.pdfIn PDF document text
- http://warmistore.com/userfiles/file/difemosadodotagutanisi.pdfIn PDF document text
- https://zmiz.hr/userfiles/file/80054768778.pdfIn PDF document text
- https://larioenergy.net/uploads/file/jaxukatefod.pdfIn PDF document text
- http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/19525128645.pdfIn PDF document text
- https://alnahamgroup.com/userfiles/file/vadojax.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_off0000c6a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC6A9	16708 bytes
SHA-256: `b4cce9848d14f1b279a979d31be205e0cd0b5a5128c07cf554b24d918c861dfe`
`font_01_sfnt_off0000f1dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1DD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000109f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109F4	10372 bytes
SHA-256: `5398a769ed11b6ec4fc46ca05a9ed83109936426b8b91812faf3a83c6e230f5c`

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