PDF malware analysis — malicious · 7de7ccdef29c4687

MALICIOUS

PDF

88.5 KB Created: 2021-06-29 21:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 3818b09f4633ceed934c33df5f6c5c1e SHA-1: e230da5a61785f3a5fa8e3d144fc28ac2742e56f SHA-256: 7de7ccdef29c46876e3f2ad8187af747ef2bc536d37e0b09c79397a1545650e1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 external websites, some hosted on compromised CMS platforms. The presence of numerous URLs, including those with 'utm_term' parameters, suggests an attempt to drive traffic for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://irlanc.ru/uplcv?utm_term=chilled+water+pump+diagram PDF link annotation
- http://desagresbrts.com/clients/34568/File/gifigibukasawuxu.pdfIn PDF document text
- https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160776403d0705---favedonobutajuneb.pdfIn PDF document text
- https://agrilaui.com/userfiles/file/jibejejalepede.pdfIn PDF document text
- http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3cbfc57df---8339941547.pdfIn PDF document text
- https://pacie.vn/web/uploads/files/3315059927.pdfIn PDF document text
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/7cf5a9cf9a362f51738cd50647f13e39/69749473392.pdfIn PDF document text
- http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5f47cbdf4---kosaxo.pdfIn PDF document text
- http://curry-box-deluxe.de/userfiles/file/48389199065.pdfIn PDF document text
- http://sl-light.ru/design/img/upload/file/44332928870.pdfIn PDF document text
- https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f776fd7962---lavejaniwakafolib.pdfIn PDF document text
- https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/613c9ef14a73d7cf5447a01ad28c0fe1/xosafatipagoxitawisumepik.pdfIn PDF document text
- https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/88bd4f7652b250cf8771ed196978cae9/kukodojewesafi.pdfIn PDF document text
- https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/6ee0k0kvndrvgna0k29ntg3d93/fumenujuwotibafatemexutem.pdfIn PDF document text
- http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/8e2e578c84ff07a0bb08ae21bad5dad0/mosekiniruribigup.pdfIn PDF document text
- https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/b0d8ef9b268e639f4f172945bab379e9/zuxujiniken.pdfIn PDF document text
- http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/016be5fd6d0f1acbd4bee79d4ac7117b/majibelikav.pdfIn PDF document text
- http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836661357a7---30058641220.pdfIn PDF document text
- http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087836f8e809---76268133903.pdfIn PDF document text
- http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc7228402e---womiwa.pdfIn PDF document text
- https://istocdukkan.com/userfiles/files/gurojebifeluwufasepimijo.pdfIn PDF document text
- https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/ucnmp653f38gofirges7l77hp4/sowoxojazibetam.pdfIn PDF document text
- http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607612d4d9d6d---75775278243.pdfIn PDF document text
- https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/7362ac9af1d118200c2aa467b10b1344/43565270597.pdfIn PDF document text
- http://esoftland.com/userfiles/file/toxubiwurelu.pdfIn PDF document text
- http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609888e3b880e---nokumenagap.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_off0000f822.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF822	10664 bytes
SHA-256: `f10d6ce6a469ad9c4560143065c933f954847556cdca3915a6231d70228f8cb9`
`font_01_sfnt_off00011066.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11066	16440 bytes
SHA-256: `b4760fc0c0238052a2794fe84c55fcfe684fe30ffbb0fc5cfbcea0ecd6f94af0`
`font_02_sfnt_off00013b2e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13B2E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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