PDF malware analysis — malicious · a9e7db9a94db0325

MALICIOUS

PDF

89.8 KB Created: 2021-07-01 22:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 0c1108781a2ec2aa56e5df8a8775a7ef SHA-1: 05f5c0107537a4fcd6e0a963383e76c2d5059597 SHA-256: a9e7db9a94db03251d3315050487b866347595da5155af8100028d20ef535ebf

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload storage and disposable hosting. The primary purpose appears to be directing users to malicious content or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://ankamet.com/userfiles/file/75322616623.pdf In PDF document text
- https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/f6s2m0ssj9geob9tnnh59lf9l4/vorizavufinamigokevesij.pdfIn PDF document text
- https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/9bf614c88b708f7fc306154707f07f52/lusixenivopepilopezifubol.pdfIn PDF document text
- https://bbpartner.cz/userfiles/file/63732029020.pdfIn PDF document text
- https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/1gvo7uvgnhkctd132ted920j2m/pevixugopudumadiporu.pdfIn PDF document text
- http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ac67c66adf4---bijeleliregafojepo.pdfIn PDF document text
- http://mega.kz/media/upload/files/73243756074.pdfIn PDF document text
- http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16087bb3441a91---pubugegareb.pdfIn PDF document text
- http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c15fad93cfb---karaluzevemufujexo.pdfIn PDF document text
- https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c06b549f0cd---323216483.pdfIn PDF document text
- https://ctapigroup3.com/contents//files/jugewuzixojufuketamuv.pdfIn PDF document text
- http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/c7d8c1ac1b9c7e9dbd077ca883a336fe/zobabugosadutuvexigu.pdfIn PDF document text
- https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/pa53r66q0odtijcvtb9imsaq1m/xejunibolizafupalodivesuz.pdfIn PDF document text
- http://amctop.com/board_data/editor_img/file/202105290808.pdfIn PDF document text
- http://jhroseclassof77.com/clients/45984/File/41081321701.pdfIn PDF document text
- https://tckontrola.hr/files/26480911920.pdfIn PDF document text
- http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074121813a5d---38479338223.pdfIn PDF document text
- http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e62527451d---60247530921.pdfIn PDF document text
- http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834b85591f7---99246537570.pdfIn PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/4207e926b3f7a42e077879cd9d74afd8/jemita.pdfIn PDF document text
- https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/4109fcf5b796f0ec754d7c150c2f5e02/35453559723.pdfIn PDF document text
- https://securityguardsupply.org/php/uploads/file/favulivukokukatasixibeset.pdfIn PDF document text
- http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b54576b04---pulefefufivekisidupesix.pdfIn PDF document text
- http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a984f0fd24---xudawavij.pdfIn PDF document text
- https://radmangroup-ye.com/rgfiles/file/karenivawero.pdfIn PDF document text
- https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/8d81aef1659527f681effafaf15f1ce8/fivuziwitesapekiviz.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=pathfinder+age+categoriesPDF 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_off0000f96e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF96E	17664 bytes
SHA-256: `74ebdfa8bd6a4b3ffac42128bbf59a2a489a66177ea8cdddf75cce94c1e63bcd`
`font_01_sfnt_off000127ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x127EF	10712 bytes
SHA-256: `af142577e1a6793b87b89111dd3392704ab747be91ca202ba61d02ab8808b766`
`font_02_sfnt_off00014043.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14043	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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