PDF malware analysis — malicious · b0cee62b4d06a1ea

MALICIOUS

PDF

82.3 KB Created: 2021-09-10 17:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 07fb039b0010c045dafcd78780028d8f SHA-1: 97bcd47d45798601ec9c7660cd768b26c419ccad SHA-256: b0cee62b4d06a1ea52ae95e59a7d172bffd9561967216c7ff92aa396d2ffc045

164 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains a JavaScript action and numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. The JavaScript action is likely used to redirect the user to one of the numerous malicious URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. 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://ketchas.ru/uplcv?utm_term=why+should+i+switch+from+android+to+iphone PDF link annotation
- http://reckdance.pl/userfiles/file/11420597655.pdfIn PDF document text
- https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae5340b1ce---3749690443.pdfIn PDF document text
- http://jonellchem.com/upload/files/36119473016.pdfIn PDF document text
- http://skkouty.cz/ckfinder/userfiles/files/56733603091.pdfIn PDF document text
- http://akvatoria.by/UserFiles/files/duwiligebuzomabotu.pdfIn PDF document text
- https://heritran.vn/uploads/news_file/36969459636.pdfIn PDF document text
- https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/687cd46bd28ba2f743c88e895494fcb4/dakugun.pdfIn PDF document text
- http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/zipeze.pdfIn PDF document text
- http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c26983fac---bojinafu.pdfIn PDF document text
- http://thienanglass.vn/upload/files/95378237647.pdfIn PDF document text
- http://ap116.ru/userfiles/file/50416551347.pdfIn PDF document text
- http://k12kos.com/ckfinder/userfiles/files/76658962390.pdfIn PDF document text
- http://uat2.hkha.com.hk/ckfinder/userfiles/files/69511624064.pdfIn PDF document text
- http://crosswaysrecruitment.com/userfiles/file/8751625923.pdfIn PDF document text
- http://www.lovebliss.tw/UserFiles/files/wutiguwosoremezatiw.pdfIn PDF document text
- http://interiorconsignments.com/media/file/dubapovora.pdfIn PDF document text
- http://mevlanaasm.com/resimler/files/8419603059.pdfIn PDF document text
- https://carpenterstouchnj.supremeroi.com/FCKeditor/file/momuvata.pdfIn PDF document text
- https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/e5de773d3588d81927a3b627bf51244c/43808163691.pdfIn PDF document text
- https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fca0177f3a---21114994894.pdfIn PDF document text
- http://lev-steklo.ru/userfiles/file/14335101828.pdfIn PDF document text
- https://nikunjfoundation.org/ckfinder/userfiles/files/vuvapotadusarozejobokinuz.pdfIn PDF document text
- http://whuntex.ru/userfiles/file/40832947521.pdfIn PDF document text
- https://pastijptoto.com/contents/files/veloruti.pdfIn PDF document text
- http://ecole.ru/text/images/file/sikomavefetamevekukam.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_off0000dc69.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC69	17192 bytes
SHA-256: `6e571db4332d7f46098aeafe58be9d3a7909a64598ad00cafe4a6f25f8822ff8`
`font_01_sfnt_off000108d0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108D0	11176 bytes
SHA-256: `1b8cb763b6d72ada6aa87de650c9930de81f3cb88813dea4a10a7e9591a7c4bb`
`font_02_sfnt_off000122d5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x122D5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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