PDF malware analysis — malicious · b06e0f087868556b

MALICIOUS

PDF

87.7 KB Created: 2021-06-26 19:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 7f0aedf6c813bcf29200becc13c4be7c SHA-1: c2ceb9944a1e56b3a4e1225e31f608f741e0831a SHA-256: b06e0f087868556b270764d5bb9d2ed2ae55580779be16cccd867bbc9af9b5f1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload locations and other disposable hosting sites. The embedded URLs, such as 'https://coretry.ru/uplcv?utm_term=wild+geese+by+mary+oliver+poem', are likely used for phishing or to distribute further malware.

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 https://coretry.ru/uplcv?utm_term=wild+geese+by+mary+oliver+poem PDF link annotation
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f723de43e7---62112230830.pdfIn PDF document text
- https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607463891cf1f---64339956323.pdfIn PDF document text
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094cf2bdccbc---tonatemitinefus.pdfIn PDF document text
- http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160979e4bc3b61---xonugoritusilaviz.pdfIn PDF document text
- http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca56728109---82068962445.pdfIn PDF document text
- http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608118a302121---8372703695.pdfIn PDF document text
- http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/17fd3e86a95416709cd68d69de6f35a5/96736557810.pdfIn PDF document text
- https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/cd931b09fbc8980dad96e35e794c5c27/tanepanivirasumebamixep.pdfIn PDF document text
- http://bmsorganica.com/userfiles/file/83764350542.pdfIn PDF document text
- http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/9kdooojcg2sig9jb725d9m18q5/42857074614.pdfIn PDF document text
- https://restaurantenunti.ro/userfiles/file/21466639071.pdfIn PDF document text
- https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c58e33d6d---gulunoxemepufazusujugi.pdfIn PDF document text
- https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/57591a4a0eb8562bd8d1ae27446eb50c/doduxobukobuparibuja.pdfIn PDF document text
- https://baohohoanglong.com/userfiles/file/36183297299.pdfIn PDF document text
- https://ferado.vn/userfiles/file/pumosibizawosudinavelulof.pdfIn PDF document text
- https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac24d7d895f---80294494853.pdfIn PDF document text
- http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2138b20ada---femuxibumisanepi.pdfIn PDF document text
- http://www.thaiboat.net/image/upload/File/39908870445.pdfIn PDF document text
- http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4c45c7953---nifalasima.pdfIn PDF document text
- http://syarmarka.ru/userfiles/files/nijobugiwisopevupelu.pdfIn PDF document text
- http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff211a1b8b---zogemizatojutudoxopidixad.pdfIn PDF document text
- https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/d35af67598d1187f91a6fe233b70f86d/xewigosujegikutiwefaki.pdfIn PDF document text
- https://muratay.nl/userfiles/file/segijini.pdfIn PDF document text
- http://guowangcable.com/d/files/71646608082.pdfIn PDF document text
- https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/r3s5llp02jrsfnbich8va6gcf3/60051924811.pdfIn PDF document text
- https://batikatravels.com/userfiles/file/jemefelepusijewawusip.pdfIn PDF document text
- 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_off0000f35a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF35A	10844 bytes
SHA-256: `643d8cd5550d3d9240d7407073161abe7a7e15084a186956ef0a1e1a3e806204`
`font_01_sfnt_off00010bf3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BF3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012405.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12405	16764 bytes
SHA-256: `421872708dc09a35eba6a77d7ff242a11b6a6776c97fccdbe69caa1c8a05b77a`

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