PDF malware analysis — malicious · 9503e395160ed3f5

MALICIOUS

PDF

78.6 KB Created: 2021-09-30 18:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 6e03075856d33190d63ef3b8be8567e2 SHA-1: a31402074fdc657d00b9d9d50dd46bfd68ef25ae SHA-256: 9503e395160ed3f56cf567b3870a0e9c2fcf3b4d28d2c0f4cda9143f87044b62

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, with a high ML classifier score and ClamAV detection indicating malicious intent. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely to download additional payloads or redirect the user to phishing sites. The numerous external links, many pointing to unknown domains, further support a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9958

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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 http://kino-cosmik.ru/sadm_files/87934189378.pdf In PDF document text
- https://baatco.com/ckfinder/userfiles/files/5889812641.pdfIn PDF document text
- https://thepainter.asia/upload/files/ponukeditixujutupajev.pdfIn PDF document text
- http://blow-w124.com/js/upload/files/xotiwejefarusagenemekulob.pdfIn PDF document text
- http://rotang.net/userfiles/file/bigito.pdfIn PDF document text
- http://canadianartistic.com/userfiles/file/42378020276.pdfIn PDF document text
- http://theemasternetworker.com/ckfinder/userfiles/files/jazamodasaf.pdfIn PDF document text
- http://wasserentkalkung.at/ckfinder/userfiles/files/fitin.pdfIn PDF document text
- http://ansatrans.ru/admin/ckfinder/userfiles/files/tekadavivas.pdfIn PDF document text
- https://travellifeafrica.com/ci/userfiles/files/59284587322.pdfIn PDF document text
- https://kattliv.com/kattliv/admin/userfiles/file/20215396421.pdfIn PDF document text
- https://groupekineconcept.com/userfiles/file/paluvexubozuvebewuko.pdfIn PDF document text
- http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16131d7de5a0e4---kikovoxunidukir.pdfIn PDF document text
- http://suliaok.com/v15/Upload/file/2021930182523841.pdfIn PDF document text
- http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/kogolafedisosimavumozisi.pdfIn PDF document text
- http://islenapuntos.com/campannas/file/riwigozun.pdfIn PDF document text
- https://villamishkan.com/310renonew/front/images/files/563534848.pdfIn PDF document text
- https://doctornhospital.com/banglanews24/editorsfiles/files/buzugotakomazuduvekuj.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e38e92d8f8---32828975198.pdfIn PDF document text
- http://karpatskiles.ru/store/file/44170785865.pdfIn PDF document text
- https://ngenadmin2.nextgenphotosolutions-beta.com/app/webroot/files/file/fufalojavo.pdfIn PDF document text
- http://valsadindustries.com/userfiles/file/97695034121.pdfIn PDF document text
- http://krakowska98.com/zdjecia/fck/file/43726605083.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=es+file+commanderPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c106.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC106	10520 bytes
SHA-256: `cf56bb21793f4758cca759c4725c7de677cc3800e55b1b22b821892ecd5f76a2`
`font_01_sfnt_off0000d8df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8DF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f0f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0F1	24932 bytes
SHA-256: `127bb6b5f4520bcfbbf1efa7fdd8ecb1b61e4ef0ce47e6633a9b28f7b421dbb4`

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