PDF malware analysis — malicious · 0f780d78d8dbff22

MALICIOUS

PDF

82.5 KB Created: 2021-08-21 07:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: b78316111b6fdb5a87cbbd8b9607a26e SHA-1: 1ead479d0319b3ea2bd3f4dd1006faa1e0a1bb94 SHA-256: 0f780d78d8dbff22281561c0eb135b4b387d6452f6bcde5d6229525a2edea30d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. No scripts were extracted, but the structure and URL distribution are indicative of a phishing or redirection campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9983

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://crewmak.ru/uplcv?utm_term=weed+firm+2+cheats+download PDF link annotation
- https://rtvpuls.com/ckfinder/userfiles/files/vixujizudumemizeje.pdfIn PDF document text
- http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/ffee979f278d58e9d53a7156e64c113f/77900233685.pdfIn PDF document text
- https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/03b2a094d7ffc98b51db329a1e041779/85871207344.pdfIn PDF document text
- http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac7e592d82---98877535577.pdfIn PDF document text
- http://jr-bang.com/uploadfiles/20210630002645.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607953306a31b---9845204623.pdfIn PDF document text
- http://chamdure.com/DATA/files/najiwebanizixinefedu.pdfIn PDF document text
- http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8d0b02da6---2473060744.pdfIn PDF document text
- http://maility.pl/_ADRESuserfiles/file/88362784329.pdfIn PDF document text
- https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/5da324db54201b64729848bcc96600e7/43309683305.pdfIn PDF document text
- http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160866983501fb---40908863892.pdfIn PDF document text
- http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7d14e9b9c---73521155457.pdfIn PDF document text
- http://logistra.fr/ressource/site-image/files/86303375185.pdfIn PDF document text
- http://tsradviseurs.nl/mailing/images/photo/file/77947428549.pdfIn PDF document text
- http://cmuniontravel.com/userfiles/file/pokuviwimo.pdfIn PDF document text
- https://doanhnghiepvietnam.org/img_duhoc/files/73179307477.pdfIn PDF document text
- http://tcihk.com/userfiles/gitebufovutesedodimuk.pdfIn PDF document text
- http://0851gay.org/userfiles/202108file/2021082018253870554.pdfIn PDF document text
- http://wsp.pl/userfiles/file/bixofudotijojafarej.pdfIn PDF document text
- http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608b514f9272c---7553382426.pdfIn PDF document text
- http://studiomontironi.eu/userfiles/files/kelugavimuvologodewu.pdfIn PDF document text
- https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/ac8ee4376e8af66c7dfc3561672496f3/pidexujenufetigake.pdfIn PDF document text
- http://meteosputnik.ru/userfiles/file/2185070528.pdfIn PDF document text
- https://mccartha-cobb.com/userfiles/files/vemafitesiwapip.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_off0000de62.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE62	16932 bytes
SHA-256: `715a7524201e1f93b2b7f3508f3d938df1f7c6548a6d650667d01a837324dbed`
`font_01_sfnt_off00010a81.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A81	10940 bytes
SHA-256: `c0470601071cbd3010386c7af5a0de4cb9848f08983dbbb797ba659718041fd1`
`font_02_sfnt_off000123ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x123CA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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