PDF malware analysis — malicious · f768eea928e9d1a0

MALICIOUS

PDF

73.8 KB Created: 2021-09-07 22:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 0da5221fbb57e6c02c4eb39e7c98af5d SHA-1: b34c0372a740f8f6183436f9a6f22d64fd88b064 SHA-256: f768eea928e9d1a0b4250c5e12f124d35ba4886e2e2928bc86f25efdf133f70d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The 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, with many URLs pointing to potentially compromised CMS upload directories. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to redirect users to external, potentially malicious content, possibly for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

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://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1612506b985fa2---luwowobi.pdf In PDF document text
- https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/8e3f302a8005c1cb3761895b34c48f75/sajefuzug.pdfIn PDF document text
- http://neonatal-surgery.ru/userfiles/files/gonevaxutojevimi.pdfIn PDF document text
- https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d79f1619581---vabukuki.pdfIn PDF document text
- http://timecraftz.com/userfiles/file/kepalamidadujulexedorexiv.pdfIn PDF document text
- https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7e1c3c4ec4414906319125b0683fb8c3/noxudewogadozogawolurin.pdfIn PDF document text
- https://purmoradiatoriai.lt/images/files/7631383262.pdfIn PDF document text
- http://akgikorea.com/file_upload/fck_upfile/file/88283733019.pdfIn PDF document text
- https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/9e0f56df823a82a923a44a82e063c95f/gabisekomagog.pdfIn PDF document text
- http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/57275902481.pdfIn PDF document text
- https://condicionamentofisico.com/arquivos/file/22280246512.pdfIn PDF document text
- http://emurus.jp/userfiles/file/raserojodatixazaru.pdfIn PDF document text
- https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d5f643b1a40e910b2084d7f5cfd89189/majofovuv.pdfIn PDF document text
- https://limblength-sldf.com/userfiles/file/rilijav.pdfIn PDF document text
- http://mazdooradda.com/userfiles/file/72784294628.pdfIn PDF document text
- https://al-farh-iq.com/upload/userfiles/file/bajidowevinodafod.pdfIn PDF document text
- http://self119.net/upload/userfiles/2021/06/files/210606121903.pdfIn PDF document text
- http://beveragesgs.com/userfiles/file/74908134482.pdfIn PDF document text
- https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d66920d866---5240005607.pdfIn PDF document text
- http://blankheich.de/images/uploads/file/fedubogovamukubut.pdfIn PDF document text
- https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161005223430c9---28660182512.pdfIn PDF document text
- https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/59462a1957bec521fdd05b699141dd87/lawenegokusojav.pdfIn PDF document text
- https://hglobaltourb2c.com/FileData/ckfinder/files/20210827_6065B902FF08D92B.pdfIn PDF document text
- http://lapawan15.com/shop/fck_file/file/vabirikopasiganivi.pdfIn PDF document text
- https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/f85edd27215b0d43dcb56a396d2f2d37/97419362155.pdfIn PDF document text
- http://kiszelyugyvediiroda.hu/docs/file/mitotisetupodaf.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=venture+capital+deal+terms+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_off0000beec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBEEC	16296 bytes
SHA-256: `a3d7c64d4edf3e95f0dbc3d69a3a354882f15d9d9a9d9365f866c2b7a57187e9`
`font_01_sfnt_off0000e8ec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8EC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010103.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10103	10728 bytes
SHA-256: `d00aad5fe734c8ff0201dc3c0f82c7751fd8d33800dec93105bc8f2be6ba1988`

Open this report in the interactive analyzer, or submit your own file for analysis.