PDF malware analysis — malicious · 0c64ffa33c67d0ea

MALICIOUS

PDF

76.7 KB Created: 2021-09-02 15:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 4cadf9ae4b92266801323b65a60c4fd3 SHA-1: 8569660f2b770a385b3b86500a06461be1346a45 SHA-256: 0c64ffa33c67d0eaaca2669b72cb51479d08b7c0e66fc22cf499dbc55f3e9658

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://cructi.ru/uplcv?utm_term=proportional+relationship+worksheets+grade+7 PDF link annotation
- https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/9cdde911d36fa165d0fd549aa38d85ac/8294823926.pdfIn PDF document text
- http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbea27504b---dokopobomozalakunir.pdfIn PDF document text
- http://multifamilyfoundation.org/clients/3/38/38c33163524538bb895552046de0b362/File/nedilefigoluzumoser.pdfIn PDF document text
- http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608305674ac1d---90327629539.pdfIn PDF document text
- https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/ufjmj3n93blmgni3bjfg8phq45/79168455909.pdfIn PDF document text
- https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ab7c2198---98230465888.pdfIn PDF document text
- http://fundacionecla.org/resources/original/file/74043038157.pdfIn PDF document text
- http://saatgaamkansarasamaj.com/admin/uploads/files/nozotavirifapezozofepaf.pdfIn PDF document text
- http://www.herbertvanderbrugghen.nl/draft/xonuvodud.pdfIn PDF document text
- https://simon-daulte.com/ckfinder/userfiles/files/bonovirajufe.pdfIn PDF document text
- http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a347f650c99---93433441299.pdfIn PDF document text
- http://www.darvidproperty.com/news/file/34817284971.pdfIn PDF document text
- https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16098350b67947---84669881135.pdfIn PDF document text
- http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fbf05bb2c68---94325162298.pdfIn PDF document text
- http://www.pattyn360.com/upload/forum/files/96701039679.pdfIn PDF document text
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083c9f416c04---63846486202.pdfIn PDF document text
- https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16120a744753f4---42695509297.pdfIn PDF document text
- https://aristi-trap.com/upload/users/files/44336577350.pdfIn PDF document text
- https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/700460ee80bb4bd232c591f3f8d9b3a9/41989743953.pdfIn PDF document text
- https://guijek.com/userfiles/file/savabakubefuzawexin.pdfIn PDF document text
- http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2dd41db43e---lugisepeluzanijikawo.pdfIn PDF document text
- http://schodylux.pl/userfiles/file/18471810881.pdfIn PDF document text
- https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/7as7d1dlalec3srss3dovqmtl5/64927449860.pdfIn PDF document text
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd61c758b00---gadow.pdfIn PDF document text
- https://honkakuji.jp/honkakuji/images/ckfinder/files/nukejozukadisejukazube.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_off0000c72a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC72A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000df3c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF3C	17064 bytes
SHA-256: `d418d44867bc337cfb942d1ff12dc169149af7f07e261b43d9884b35df7e9e81`
`font_02_sfnt_off00010b77.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B77	10900 bytes
SHA-256: `2e1c65b2a37635dc49614f1cf64233d9ff555ed6bd5193242e96912d170678e5`

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