PDF malware analysis — malicious · e8bc59f2e3d7b70b

MALICIOUS

PDF

84.2 KB Created: 2021-06-30 01:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 04119b61ec8a52a3dfcd7bd9d788528e SHA-1: 2c2b3611b0751e2beee2ebdf3bacf0918eb83d31 SHA-256: e8bc59f2e3d7b70b4b1c87b891cea6c83ac04e2dfb5a43b29b32ad81bb49065f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites, suggesting an attempt to distribute phishing content or further malware. The presence of multiple distinct hosts and the use of 'utm_term' parameters indicate a coordinated effort to leverage SEO or deceptive links.

Machine Learning

Nyx PDF Classifier malicious score 0.9964

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 https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8ab4bc110871fc15c0843ca9cf90c37c/80410511589.pdf In PDF document text
- http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd52c61418---29224090427.pdfIn PDF document text
- https://nanyangtextile.com/userfiles/file/jitukudiwonamamalem.pdfIn PDF document text
- https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/218f2506880031ac81206f1e3edf1ccb/61521558951.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a546d3c34---50667580494.pdfIn PDF document text
- http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/d73294a83781f428030baea9c0b0d0c0/fipazupopedu.pdfIn PDF document text
- https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/f39f221c178ed3422e275c31211546ee/4181239050.pdfIn PDF document text
- http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a19aa731591---bobuj.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/susetitepuxelusetadazevaf.pdfIn PDF document text
- http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082eb6fc0517---63493577679.pdfIn PDF document text
- http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/4745647f2d78e1db2d537f21113dac97/12111322903.pdfIn PDF document text
- https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7724a0673---najajij.pdfIn PDF document text
- http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609876929707e---monuwesog.pdfIn PDF document text
- https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097350fa7a95---56782928168.pdfIn PDF document text
- https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cefd4144d1---70698947807.pdfIn PDF document text
- http://africanhairbraidingsalon.com/userfiles/file/42874040878.pdfIn PDF document text
- http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d39df647c1---88958529144.pdfIn PDF document text
- https://mvpartners.be/images/uploadedimages/file/tuxonojininewas.pdfIn PDF document text
- http://swissies.lt/ckfinder/userfiles/files/nuwutedepolom.pdfIn PDF document text
- https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/47803e3a177eaf6acfa4705b886c8f54/vozidiza.pdfIn PDF document text
- http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746c95a14a5---tafujasevemikeja.pdfIn PDF document text
- http://nhatminhtrading.vn/app/webroot/uploads/files/rabijiwujam.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=lowenfeld+stages+of+artistic+development+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_off0000e768.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE768	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ff7a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF7A	16396 bytes
SHA-256: `1685ccbd53ae728634363137569d5003ebf07f1b1fbd1b3e8047e54fb3097490`
`font_02_sfnt_off000129e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x129E4	11072 bytes
SHA-256: `b6658e38d543cac614c33f86f60ecda1e5fbba0d0750a262310c7007db6f4a41`

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