PDF malware analysis — malicious · 602d7c0eb4273c78

MALICIOUS

PDF

82.1 KB Created: 2021-08-20 21:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: e0240026ade0dec9f67a05da9678344b SHA-1: d54fcc010dc8aa6d15924f08d7819308122a362b SHA-256: 602d7c0eb4273c78b76d79bf5aa4e7e0d25893a8c5c88d9029a3d744e76ad697

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as containing a link farm and was detected as malicious by ClamAV and an ML classifier. The document body is heavily obfuscated, but the presence of numerous external URIs and link farm indicators suggests an attempt to redirect users to potentially malicious websites. The primary attack pattern involves leveraging these links for phishing or SEO manipulation.

Machine Learning

Nyx PDF Classifier malicious score 0.9944

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
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://targhevaticane.it/userfiles/files/sopalivolebevoresonaxidu.pdf In PDF document text
- https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/108fd0a169f392a9936222bba9f70227/bonegomavamuwiza.pdfIn PDF document text
- https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087425ecc0b1---10581835654.pdfIn PDF document text
- https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/04327182916e7fd7e36d06aa43e289a9/koropezesik.pdfIn PDF document text
- http://slsnn.ru/content/files/8901209215.pdfIn PDF document text
- http://headlinesdinerla.com/uploads/files/9710559388.pdfIn PDF document text
- http://sparkpro.lv/content/file/20201254195.pdfIn PDF document text
- https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac5cd78207---lirisamovalijinafubi.pdfIn PDF document text
- http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792586eaba5---21296916750.pdfIn PDF document text
- http://savages.lu/imagesRTE/files/4044715143.pdfIn PDF document text
- http://terezmisszio.eu/files/file/kasopixoxe.pdfIn PDF document text
- https://gonguyenkhoi.vn/upload/files/95324405403.pdfIn PDF document text
- http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/64f177e79bcb899cda0d30534527ea73/jawuvujajikape.pdfIn PDF document text
- http://aaaexpressheating.com/userfiles/file/24027970339.pdfIn PDF document text
- https://sarvodayasamaj.uk/upload/files/44459376074.pdfIn PDF document text
- https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608999ec83d48---84304952719.pdfIn PDF document text
- http://chinoboxingclub.com/clients/36032/File/fafonedusexovigaparopofim.pdfIn PDF document text
- http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc812eb204---vikalogip.pdfIn PDF document text
- http://7linc.com/uploadfiles/fckeditor/20210724/file/16270795595480.pdfIn PDF document text
- http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805b45ae495---75581739303.pdfIn PDF document text
- http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160713ca881b98---radixerib.pdfIn PDF document text
- https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609082832d055---dorizefiwixe.pdfIn PDF document text
- http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160928fa7d5c13---parovujazozo.pdfIn PDF document text
- https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/vnmbhperghqr6pjlng4mapk8s7/16375096352.pdfIn PDF document text
- http://villabrown.it/userfiles/files/fugisopidowulazi.pdfIn PDF document text
- http://spreewaldatelier.de/img/editor/file/58719294497.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+weld+aluminum+with+a+dc+tig+welderPDF 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_off0000def7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEF7	10828 bytes
SHA-256: `5b0986cf471ac0a87f789fe327bd4e52ece82739ba3b469bd8c9802d1afc77e4`
`font_01_sfnt_off0000f77c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF77C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010f8e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F8E	15944 bytes
SHA-256: `b3e92b8feafcdd8e3d39752f6342edcbd8d2b0683550557913a8540b8b0654c7`

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