PDF malware analysis — malicious · 47c315b5a81a0f72

MALICIOUS

PDF

91.0 KB Created: 2021-06-28 20:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 3e0a2446ed6ef7cd8dd72885380c9e2e SHA-1: fc5bb66c865d041327be16d6cdec9f7d8e68ea23 SHA-256: 47c315b5a81a0f7219001843dcbd2d250b6f54e455f8b500c883c8684beba843

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The heuristics indicate the PDF acts as a link farm, directing users to compromised WordPress upload storage and other potentially malicious sites. While no scripts were explicitly extracted, the nature of the link farm and the ML classifier's output suggest an intent to deliver a malicious payload or phish for credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b1faa6713---muratufagibe.pdf In PDF document text
- http://irishvaughans.com/clients/7/7c/7cfe0b8ff6d5e3136a6575a9b258a09c/File/88979181868.pdfIn PDF document text
- http://bakoca.hu/files/file/13515543839.pdfIn PDF document text
- http://oaklandscreche.ie/userfiles/files/divelojesugenanivemu.pdfIn PDF document text
- https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/2af8884f4a855cb517eca3c3a315a7cf/tikube.pdfIn PDF document text
- http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608263e51f24d---gugezupegeki.pdfIn PDF document text
- https://syntellect.ru/Repository/file/punutotulakavepusifude.pdfIn PDF document text
- https://lotteppta.com/beta/assets/file/zusebi.pdfIn PDF document text
- http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090f677bea6c---69681283705.pdfIn PDF document text
- http://closehorses.com/userfiles/file/31523625347.pdfIn PDF document text
- http://albatrossmrn.com/konadnew/userfiles/file/kemaxaserizoxezevotatemig.pdfIn PDF document text
- https://keongracun.org/contents//files/85853224826.pdfIn PDF document text
- http://aircond.md/upload_fck/file/70163016948.pdfIn PDF document text
- http://eros-arena.de/eros/userfiles/file/82129431353.pdfIn PDF document text
- http://chinazzjx.com/d/files/33483221264.pdfIn PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6e70562bd---wozazupazoduxo.pdfIn PDF document text
- http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ab5e28d84---31766747161.pdfIn PDF document text
- http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2c66871fb---jenawoxekut.pdfIn PDF document text
- https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a075ff593ea---27446683971.pdfIn PDF document text
- https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/l7sd4nqsgm5hk1lm7l8fefv4qd/93009457251.pdfIn PDF document text
- https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/a0b2c818f0770eeaf45372c312b3c133/rudirobutibufo.pdfIn PDF document text
- https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16099c832472fd---30959073394.pdfIn PDF document text
- https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a63b1f4ee0f852fd7312bc4418c1b70f/89331351367.pdfIn PDF document text
- https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/83122109899604a16a8f40b00a7425f0/35550448297.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa08649d5bb---bunodupuxumazitaralulup.pdfIn PDF document text
- https://atcotourismtravel.com/userfiles/file/vowofobedapikitire.pdfIn PDF document text
- https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c45fd8324a---82677714132.pdfIn PDF document text
- https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e984fca100---zilerivenesapaninuvitat.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=five+point+someone+in+pdfPDF 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_off0001008a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1008A	10396 bytes
SHA-256: `866944155f12d1300072949e3838d767727b284b6b62cdc01e70c8a76ed7238a`
`font_01_sfnt_off0001180f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1180F	17820 bytes
SHA-256: `e9d9aca33af78baf03606b779c63037b0fc33c24943e6ce9eae1509896a7bdb1`
`font_02_sfnt_off0001464b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1464B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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