PDF malware analysis — malicious · a62afdf890025b7d

MALICIOUS

PDF

92.6 KB Created: 2021-09-17 08:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: e8c021b113b797caf27f957020da1100 SHA-1: 76cdbd6c394a428dd5c614450a206204ba6e1eda SHA-256: a62afdf890025b7db513931f45f2d212df1c5d21d5ec27261ebdaa2341891cbd

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified numerous embedded URLs, many pointing to potentially disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded content are consistent with attempts to redirect users to external, potentially malicious, websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9937

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://gencshoworganizasyon.com/upload/ckfinder/files/sutinexapozezedefomeb.pdf In PDF document text
- http://sunway.me/ROOT_PATHuploads/file/011811384225.pdfIn PDF document text
- https://elemental-ia.com/userfiles/file/pawemisizagobo.pdfIn PDF document text
- https://lifetides.ca/cambridge/uploads/files/fegejufonavesoruget.pdfIn PDF document text
- http://xn--80ab1a9a.xn--p1ai/sadm_files/jatiduk.pdfIn PDF document text
- https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/u46putlcecdh121h88tqghirh6/nevapesepozatix.pdfIn PDF document text
- https://keralatemples.info/ckfinder/userfiles/files/miruvevogefibovivexes.pdfIn PDF document text
- https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/7929e25818d1d156cc6c95c3aa3b64b2/3707395110.pdfIn PDF document text
- http://kelakewangshangduchang.a9188.com/upload_files/art_files/files/20210901_023653.pdfIn PDF document text
- http://sriagasthiyarastro.com/FCKeditor/userfiles/file/borosoketemezawi.pdfIn PDF document text
- http://diakmelo.hu/ckfinder/userfiles/files/82009753924.pdfIn PDF document text
- http://pastadimatteo.com/ckfinder/userfiles/files/16062306819.pdfIn PDF document text
- http://quangcongluc.com/upload/files/44079865681.pdfIn PDF document text
- http://bassbasement.org/userfiles/file/48629373933.pdfIn PDF document text
- http://whatcanidoforyou.eu/publish/file/40082771488.pdfIn PDF document text
- https://giriconsultancy.com/content_files/files/59955804513.pdfIn PDF document text
- http://phupmirpol.pl/userfiles/file/48186038227.pdfIn PDF document text
- https://jkmart.net/FCKFiles/File/61748069269.pdfIn PDF document text
- http://aj-freight.com/ckfinder/userfiles/files/87491129878.pdfIn PDF document text
- https://needletherapy.eu/upload/file/lijevokijajitudojabisos.pdfIn PDF document text
- http://kasintorn.com/images/upload/files/74668647221.pdfIn PDF document text
- https://novamakine.com/upload/ckfinder/files/duxokofowis.pdfIn PDF document text
- https://investincarpathians.eu/app/webroot/media/files/folowaxopajezevaru.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=cube+shape+of+basePDF link annotation
- 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_off0000ea6c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA6C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001027e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1027E	18824 bytes
SHA-256: `45e8b89f5e1b450d8feaf64dff6d853f7686aa4e0fbfb9a7db35c17c6b6b69da`
`font_02_sfnt_off000133bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x133BD	10288 bytes
SHA-256: `411680c995200fcd788e4d92c19982aead533cf08bfe10017312c84bad3fddd9`
`font_03_sfnt_off00014ad7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14AD7	17212 bytes
SHA-256: `2aa72d67725fb72acd61f397358eca9a2b6deed27d3ca26f22c66760f6867339`

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