PDF malware analysis — malicious · 96dc83d1563d6be5

MALICIOUS

PDF

88.6 KB Created: 2021-08-26 14:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 6b63f4eb4a3230c966fdfec6b6be500b SHA-1: 85013b8111d98ffb555e3c918ebc30c34e02b539 SHA-256: 96dc83d1563d6be575f56a4294ee7e6581383b10997681d62a36c57f4c2bf521

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS upload storage or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are characteristic of phishing or malware distribution campaigns.

Machine Learning

Nyx PDF Classifier malicious score 0.9764

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://huntic.ru/uplcv?utm_term=song+of+time+3ds PDF link annotation
- http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160cc9fd0ef3e8---35809892260.pdfIn PDF document text
- https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/6e856cfbb39b4d98e45231b9d01fcb91/gifetenediwawezo.pdfIn PDF document text
- https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090a099a4e55---78553324275.pdfIn PDF document text
- https://alarrabnews.com/images/content/content/file/nidud.pdfIn PDF document text
- http://facyt.com.ar/ckfinder/userfiles/files/zepin.pdfIn PDF document text
- https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c55fdb6c7---81737265028.pdfIn PDF document text
- https://stallion-international.com/userfiles/file/jazelomulojinejor.pdfIn PDF document text
- https://cornerstonelaw.eu/userfiles//file/7011842239.pdfIn PDF document text
- https://butchercurnow.com/img/shop//contents/82898850985.pdfIn PDF document text
- http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/14202239230.pdfIn PDF document text
- https://netshopnepal.com/userfiles/file/9209293919.pdfIn PDF document text
- https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/bl8co3c0a0umf737riqe2oes0l/4810916198.pdfIn PDF document text
- https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607acf2976184---fexuwotesimok.pdfIn PDF document text
- http://ty-universe.com/image/files/20210826_180352.pdfIn PDF document text
- https://millinerandassoc.com/files/file/xinis.pdfIn PDF document text
- https://szaniterplaza.hu/ckfinder/userfiles/files/fuxisu.pdfIn PDF document text
- http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0b4f7d8f6---74931873790.pdfIn PDF document text
- https://mps-india.com/userfiles/files/70225834216.pdfIn PDF document text
- https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/56oel8u57rq221csperu0p1er4/97553568084.pdfIn PDF document text
- https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/39m5fi7fiug20b3ic5t5k5ps98/wowep.pdfIn PDF document text
- http://thedreams.cz/files/xelizigurivovimug.pdfIn PDF document text
- http://bjaimama.com/data/upload/2021/07/file/202107090554074068.pdfIn PDF document text
- https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/dk4bddu3jkg83iibajm8mi7da1/32102004313.pdfIn PDF document text
- http://immobilieninvestors.eu/userfiles/file/70113626875.pdfIn PDF document text
- https://bocion.com/ckfinder/userfiles/files/10811792761.pdfIn PDF document text
- http://apsara.ru/userfiles/file/nosivawekuzakutobofalizov.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ee15.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE15	16900 bytes
SHA-256: `996e3fc57fb9da935560e7833f04201d77b0bf3f33d5f4b8f1a64321845f09d1`
`font_01_sfnt_off00011a0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A0D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001321a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1321A	2236 bytes
SHA-256: `d1cf19bd68bfdf46b7a55e55308aaa676e4972e18c5cbd33500b73939c0faccc`
`font_03_sfnt_off00013c06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13C06	10636 bytes
SHA-256: `cfaf019dca5048d3896e700986239e626121b4e9fc05503e84a7d8b98105a170`

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