PDF malware analysis — malicious · 9cc92b453e21d3f5

MALICIOUS

PDF

93.3 KB Created: 2021-08-24 07:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 7c4fbfc584cb576a44d2bc264fee9239 SHA-1: 9f341adc4419e10f7f3ee880dff4462ca7e83c91 SHA-256: 9cc92b453e21d3f55ddf8ffb952f8b332b857b18cb6924e3e1d9f9a1fb06e6b4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. Heuristics identified it as a link farm pointing to multiple distinct hosts, many of which are associated with compromised CMS uploads or disposable hosting. The primary purpose appears to be redirecting users through a chain of links, likely to a malicious landing page or for SEO manipulation.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://blissrenewbeauty.com/newerac2c/userfiles/file/faxalazesuj.pdf In PDF document text
- https://ratco-hardware.com/Ups/files/duzomawabuliporoziwaxofi.pdfIn PDF document text
- https://upbfassadenbau.com/upload/file/17652374639.pdfIn PDF document text
- http://edu-family72.ru/content/images/uploads/file/bebivekuwemu.pdfIn PDF document text
- https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/331fd8a27fd9463e98ffa9c3880cd7d6/99944709413.pdfIn PDF document text
- https://bamfieldrental.com/userfiles/file/xisofumepiwazoluno.pdfIn PDF document text
- http://cascad-trans.ru/files/74231091727.pdfIn PDF document text
- http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/u81fepnr9jsdfma8m21p4u1bk2/77947869406.pdfIn PDF document text
- https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/7d9d69a432e7c9ed3e7bcba5717f1b2f/gebukiwo.pdfIn PDF document text
- http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beab9527c82---14585469300.pdfIn PDF document text
- https://gea99.com/ckfinder/userfiles/files/6868625156.pdfIn PDF document text
- https://laatjehuisweerstralen.nl/upload/file/dexasoleratubateruka.pdfIn PDF document text
- http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4a9528745d---kisemugurigenovobo.pdfIn PDF document text
- https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/gniqu03rf5eg90eo43f89em07f/76262469150.pdfIn PDF document text
- http://koovappadyscb.com/ckfinder/userfiles/files/pozugalekokafatiferiped.pdfIn PDF document text
- https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/ee0d7c206e6f8cb0ed6b7ffc8699db87/dizewezaxelalatuzeruwe.pdfIn PDF document text
- http://pchs1967.com/clients/b/b3/b38b0c0be7ceca4b309dcb684d78a7c5/File/kapejef.pdfIn PDF document text
- http://emannsltd.com/userfiles/lidekimadalunixemopi.pdfIn PDF document text
- https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/8a60860a6e80a828e8f233fab468cfa8/jegupufeferufotaz.pdfIn PDF document text
- http://4x4autok.hu/userfiles/files/24451111873.pdfIn PDF document text
- http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca338f1a68---41292469244.pdfIn PDF document text
- https://sankaibearing.com/userfiles/files/dojewowopazusifosod.pdfIn PDF document text
- http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112b06f41ced---74268909189.pdfIn PDF document text
- http://www.ez4parcel.net/upfile/files/2021/07/20/likusorakesip.pdfIn PDF document text
- https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a1957ab3f---21776227421.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=feather+winged+dragonPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f5c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5C4	10376 bytes
SHA-256: `43672adf678e58e9c59c4f186f441ec6b7399e9f6722b77607b9d42e434e448b`
`font_01_sfnt_off00010cfe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CFE	16132 bytes
SHA-256: `eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8`
`font_02_sfnt_off0001226f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1226F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00013a81.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A81	16876 bytes
SHA-256: `78258d1d1f3fd67a5a4e1eab4b5b9b1925e58a0b2d61781d3695d9df7687afb4`

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