PDF malware analysis — malicious · e34ef2a8e29e07ff

MALICIOUS

PDF

84.6 KB Created: 2021-06-29 21:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 1f15c1cf6d8f0dc9e61f10b036a7c8da SHA-1: 81852059846d2d39e96b7c7f0ce72bc685984df5 SHA-256: e34ef2a8e29e07fffb4b913688a4dbe401a90de8c26ae72a06db136ad734efb6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. The embedded URLs, such as http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a35998b3320---26220578693.pdf, are indicative of a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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 https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/1c532d6193af432f3f18aaa3a2372ed7/wakajo.pdf In PDF document text
- https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/f5a7930a22f8049ede66f0d601dbae60/zofozawisuno.pdfIn PDF document text
- http://dichvu12h.net/userfiles/file/9652316920.pdfIn PDF document text
- https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb7ce6258d---polenega.pdfIn PDF document text
- http://waypl.pl/upload/File/rafogotetagakukoxoduge.pdfIn PDF document text
- https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/cm9sfg8a7f44bs1aonc6fpl194/jenoxoteribolagulabed.pdfIn PDF document text
- https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/635ebc1bd05a4a3879c12c83c102c8d6/59721167571.pdfIn PDF document text
- http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a189a51df7c---97992474805.pdfIn PDF document text
- https://armagedonspedycja.pl/files/file/79105233085.pdfIn PDF document text
- http://campbellelectronics.com/uploads/kabupoxikemo.pdfIn PDF document text
- http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94d3d6e512---tepatufaverivixinosezali.pdfIn PDF document text
- http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a35998b3320---26220578693.pdfIn PDF document text
- http://bezagsecurity.cz/userfiles/22263728173.pdfIn PDF document text
- http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160b501705d770---2824620962.pdfIn PDF document text
- https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/16172e558b286a5b257c7980ef877122/97780009223.pdfIn PDF document text
- http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/m3jh8camtdcko509dt7gem20su/taromagalegaz.pdfIn PDF document text
- https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/0cb80f43cf489b63a0dfec8e4b81ffb5/zekovezopozubejepe.pdfIn PDF document text
- https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/083bbcc04db5cbf2619c06de6ea36fb0/70275165036.pdfIn PDF document text
- https://wita.lt/images/files/63750407624.pdfIn PDF document text
- http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/0a472bad9c7b2e80db62168d886b9b78/2326955989.pdfIn PDF document text
- https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/9ce2e72cfd91336a6ad14b053e64aff5/17614807296.pdfIn PDF document text
- http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/77693148300.pdfIn PDF document text
- http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d6ae1a98f---rusuroluzasemexakipes.pdfIn PDF document text
- http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16072901520be7---30867959483.pdfIn PDF document text
- http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767f31ecf5f---37284116542.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=pay+for+self+assessmentPDF 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_off0000e968.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE968	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001017f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1017F	10400 bytes
SHA-256: `722a591b12751bd7b0948fb3e0f4072264516f26d26f977a98b22e9f18e485d6`
`font_02_sfnt_off0001191d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1191D	16848 bytes
SHA-256: `7f3371c16512667cda4c85f65a9b69e2788d842400a425f14a3056e824a4f26d`

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