PDF malware analysis — malicious · 67680b911e08af9f

MALICIOUS

PDF

78.5 KB Created: 2021-09-05 12:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 591712e2766657447c43a80e4e26795c SHA-1: 47cabc44768115c54942096fe558acb42d15971c SHA-256: 67680b911e08af9f467cc26828375f304b77594c4ba5bcd71439cbc6bd86ac76

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

Heuristics 6

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.
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://synerhu.ru/uplcv?utm_term=galanz+electric+oven+manual PDF link annotation
- https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/03c232e21b8f722d9bab64f708fa0784/kenemofuxivuvopifunuv.pdfIn PDF document text
- https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f910fbc0617---xusizorirobovamivuvumi.pdfIn PDF document text
- http://irishheritagesociety.net/clients/7/7f/7f3653e4c5d791bf76f28d2bf9929747/File/mukig.pdfIn PDF document text
- http://accessprecision.com/userfiles/file/77533768756.pdfIn PDF document text
- http://kimhoatra.com/upload/fckimagesfile/12102700968.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48577b095c---74490348455.pdfIn PDF document text
- https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/7deebbeb2c8ff6ddd155e5916fc8f3fb/moralenobefazo.pdfIn PDF document text
- http://suachuaspa.com/upload/images-content/files/95279907559.pdfIn PDF document text
- http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/1507b5727fddf6db3c94136fd12bcf4d/74739298760.pdfIn PDF document text
- https://stcc-sa.com/motakamel/Ups/files/nonusubew.pdfIn PDF document text
- https://susta.vn/userfiles/file/fofosimuveligij.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608782c83cfd0---jujedabagesijunam.pdfIn PDF document text
- https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/9fut99asmfcvvbtb2gqbe6k5bi/padigitanewamisa.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607885d3de80c---15502115110.pdfIn PDF document text
- https://ddshower.com/ckfinder/userfiles/files/lamil.pdfIn PDF document text
- https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b89991deb---29912065172.pdfIn PDF document text
- http://sieuthibongda.net/ckfinder/userfiles/files/80128833730.pdfIn PDF document text
- http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a3b7d8d09---72970006979.pdfIn PDF document text
- https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/b6bd834b2e2b88f4aacbf344920fbb6c/saruvomiwixajimitemobudo.pdfIn PDF document text
- https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608a876880bf9---72444609743.pdfIn PDF document text
- http://meadescafe.com/userfiles/file/dexuvuwamotenafu.pdfIn PDF document text
- http://ehhs1969.com/clients/6/67/67a0fa02f482ea8575b7cec7429e43a8/File/pugegoboxul.pdfIn PDF document text
- https://ahreco.com/uploads/news_file/befasakodojogegurogozuwod.pdfIn PDF document text
- http://raczcsalad.hu/files/vowepiginin.pdfIn PDF document text
- https://aspaeng.com/files/image/files/55300083929.pdfIn PDF document text
- http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160faebcdd83a9---vifegixikovisewa.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_off0000d0cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD0CD	16860 bytes
SHA-256: `2987ae7b4b47e994c7c30647de55b7fe90502e14e3e203b0842be7fbf8db149e`
`font_01_sfnt_off0000fc2c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC2C	10488 bytes
SHA-256: `9d66bdde06342eed2bbbe79e9715d667dee0d5e0dd3e0e90f04252e3d2139c38`
`font_02_sfnt_off00011416.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11416	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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