PDF malware analysis — malicious · a399c72a22895d20

MALICIOUS

PDF

88.8 KB Created: 2021-09-02 10:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 305854852d1504fc4bbe3ee16626d3f1 SHA-1: dcf4e8fd8680a20af43b1caa636c9a0892bc7d51 SHA-256: a399c72a22895d2072fd5b124bed23ffec9777321a1ec586cad7fefeb5b90fed

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

Nyx PDF Classifier malicious score 0.9919

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://crysiq.ru/uplcv?utm_term=reorder+the+sentence PDF link annotation
- http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160710ba71bfa4---56454178928.pdfIn PDF document text
- http://frigotechreina.com/userfiles/files/dojodezu.pdfIn PDF document text
- https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087c5e2cf44b---nogovaponesebe.pdfIn PDF document text
- https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc68bbc958---7270303700.pdfIn PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/cd6f39e0e3274679c18538f9b32292b5/89200560742.pdfIn PDF document text
- http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85fd5ac99---kojotikinemeded.pdfIn PDF document text
- http://wx-bm.cn/upload/ckimg/files/202108102104294580.pdfIn PDF document text
- https://sts-cct.com/app/webroot/userfiles/files/51956345925.pdfIn PDF document text
- http://orchid-daikanyama.com/userfiles/file/redadi.pdfIn PDF document text
- http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1cc2a27dc---52936573155.pdfIn PDF document text
- http://terralis.eu/catalogue_dynamique/file/83182168073.pdfIn PDF document text
- http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b05691101---53704839545.pdfIn PDF document text
- http://www.kickcommerce.com/userfiles/file/56156420652.pdfIn PDF document text
- http://chinhsuasolieu.com/media/files/wudezebinixujasamebak.pdfIn PDF document text
- https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/0fe0709a026863faf3adbd758550e461/bedaneri.pdfIn PDF document text
- https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe3e38561b---lutukilopaxinexowiwelam.pdfIn PDF document text
- https://esvigo.com/upload/files/pakukexepaduzunotipeb.pdfIn PDF document text
- http://hzkontejnery.cz/ckfinder/userfiles/files/70942413960.pdfIn PDF document text
- http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928e5b8ec8c---mopimotetuwuw.pdfIn PDF document text
- http://big-blue-bus.com/pics/fotos/1/file/69627534649.pdfIn PDF document text
- https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/k9p7ugiunacs2b9dtjomsamte5/28196221068.pdfIn PDF document text
- https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/a573cc71cb67a0f7715bec1bd71ef331/riseta.pdfIn PDF document text
- http://adance0112.com/upfile/editor/file/14146582251.pdfIn PDF document text
- https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/f6dadcf3916d8163de12145d6409327f/50768229452.pdfIn PDF document text
- http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e3d695d02---67977274394.pdfIn PDF document text
- https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/80d7c8f070f34a8b93fda3e47e8b5113/9696597331.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_off0000f162.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF162	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010974.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10974	19428 bytes
SHA-256: `e44e0d8057d7abba8caf5bda9e0b93fde8e61112e01d7e3a146ac974da517763`
`font_02_sfnt_off00013c4b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13C4B	10212 bytes
SHA-256: `e545e52a8245f6e36b9bcea29752bf225668406f4ccd77229addaec7f89dbd98`

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