PDF malware analysis — malicious · b1ccd83b972e762d

MALICIOUS

PDF

75.3 KB Created: 2021-08-31 22:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: bb6f0c5ad8f760aef81fbfeff6657895 SHA-1: 596c5d54c40b8a3967184de83117479daf4fd094 SHA-256: b1ccd83b972e762d080228827cd4ec0590ffe728ffc57827118b383420f60b96

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed to manipulate search engine results or direct users to malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

Nyx PDF Classifier malicious score 0.9908

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 http://1975geegees.com/clients/78603/File/28950220059.pdf In PDF document text
- https://mimpiindahsatu.com/contents//files/sexirubofuporipofuteg.pdfIn PDF document text
- http://rheinmotel.com/userfiles/file/sazirutezipijelav.pdfIn PDF document text
- https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16096ce4f0fdbd---8317871682.pdfIn PDF document text
- https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/576dcfd2f963921810e07158a7865a76/fukesorifumuziku.pdfIn PDF document text
- https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/7a4ee0ee6aab9549701271191e31cd84/83959099738.pdfIn PDF document text
- https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/d848911b541770c6ed75590bcae2cb05/9543921420.pdfIn PDF document text
- http://hoangminhphatkorea.com/webroot/img/files/54977170984.pdfIn PDF document text
- https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/914a85a778721502cd32dc27a4aa4389/83601499266.pdfIn PDF document text
- https://micast.de/wp-content/plugins/super-forms/uploads/php/files/vnseam6m3gq7u92dikl6sknkj7/fibodojigitak.pdfIn PDF document text
- http://www.anclupnapoli.it/userfiles/file/71122239477.pdfIn PDF document text
- http://www.ih-consultant.com/ckfinder/userfiles/files/80722443963.pdfIn PDF document text
- http://www.medicellbank.com/userfiles/files/42369889740.pdfIn PDF document text
- http://phuocthuan.vn/images/pic/file/zegami.pdfIn PDF document text
- https://mandarinkinesiska.com/userfiles/file/74926482213.pdfIn PDF document text
- http://borisovhlebprom.by/var/upload/file/56791402693.pdfIn PDF document text
- https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/37t1dcs6pse6oe7gf2eufptinr/begomodeporisap.pdfIn PDF document text
- https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/1ddb5781c502585aa6bdb6728f071d61/74133253877.pdfIn PDF document text
- http://ideatity.com/ckfinder/userfiles/files/20223990187.pdfIn PDF document text
- https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5a6752a55---29211935049.pdfIn PDF document text
- http://hgbs.de/userfiles/file/kiposowerimuvoveg.pdfIn PDF document text
- https://makiriaszto.hu/ckfinder/userfiles/files/64209445558.pdfIn PDF document text
- http://pnmanagementsolutions.in/uploads/serikozapilet.pdfIn PDF document text
- https://imagebuzz.net/ckfinder/userfiles/files/23859502812.pdfIn PDF document text
- http://tryinvest.eu/userfiles/files/zuxinasu.pdfIn PDF document text
- http://bualuang101.com/backoffice/upload/files/fapagolofatuj.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=erikson+learning+theoryPDF 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_off0000c3e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC3E5	17204 bytes
SHA-256: `b00bb119ccd99a6e1926baf12826aa398abd4709970ae1ea03fa060a2a16e62c`
`font_01_sfnt_off0000ef7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF7F	10576 bytes
SHA-256: `eb101cbd50cd58f1d110cce99cf593e46ca86c162bb930278a9c8b00241c02db`
`font_02_sfnt_off0001079b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1079B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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