PDF malware analysis — malicious · 8b48550f92d1fd49

MALICIOUS

PDF

141.7 KB Created: 2021-07-03 09:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: b0e3309a1c7c81ad30bfc32d3b8a428c SHA-1: f1984e5ebb9bbb29c5c70a190950df845c8665e0 SHA-256: 8b48550f92d1fd492e1664d7ffa85ace0a4fbd5dabe690c1f6ea87a54b84b73f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The PDF structure and embedded content indicate it is likely used as a lure to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9913

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://inwebjor.ru/uplcv?utm_term=rating+for+tenet PDF link annotation
- http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/2064478367193a9e8816ac2b49e61fe3/94659908646.pdfIn PDF document text
- https://ajitcoatings.com/uploads/pepurufibebijaworel.pdfIn PDF document text
- https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b71694d06---vekatusipunujufujavexef.pdfIn PDF document text
- http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097cb4babaed---29802272387.pdfIn PDF document text
- https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/7b8acad664b1328aece4a519ace8768f/22010003102.pdfIn PDF document text
- https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/322feef929ac1cef8c92e5f46260d03e/26111516258.pdfIn PDF document text
- https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/07fe3d24c438b27c7edf372ec151a826/penajimusov.pdfIn PDF document text
- http://huiking.cn/uploads/file/14213318319.pdfIn PDF document text
- https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/4f65c14a56bc1b971b6bb5287b98e2ed/pakilumotezisafiwekov.pdfIn PDF document text
- http://brunsfamilyreunion.org/clients/e/e7/e70b0594429ddd28dfd4dd2f61c76e80/File/25139737295.pdfIn PDF document text
- https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607681b8a0d9c---vajoga.pdfIn PDF document text
- http://omonetach.pl/foto/ilustracje/file/damadukunorusipakuwusuti.pdfIn PDF document text
- https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/f9a502ae2077ff2e052d994b488762bc/xunavasuru.pdfIn PDF document text
- https://pjkconstruction.ca/images/file/kawaremizovodagolapinepu.pdfIn PDF document text
- https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/lohnpp3hdu9pv411ama15u0i2t/xeregubom.pdfIn PDF document text
- https://newsru.md/upload/userfiles/files/zugat.pdfIn PDF document text
- https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607181ef20373---bizezazijinizapoduw.pdfIn PDF document text
- http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609217cbe3279---dudemamipexu.pdfIn PDF document text
- http://dianacb.cz/userfiles/file/3051403874.pdfIn PDF document text
- http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160830d9445137---xoregivifakopiku.pdfIn PDF document text
- http://veterinariacomportamentale.it/userfiles/files/7993601387.pdfIn PDF document text
- https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/gf2br0c1daduev1gjd3bqkca47/45795405844.pdfIn PDF document text
- http://gursakaryahukuk.com/images/file/65837423672.pdfIn PDF document text
- http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab62ea7b025---20142343156.pdfIn PDF document text
- http://lukasikgroup.pl/Image/files/teladid.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_off0001cb6d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1CB6D	17780 bytes
SHA-256: `2de949cd31081886f4b34e9a50b1ec5ffd58bf8bcb5c6b25d560ece98361fe5e`
`font_01_sfnt_off0001f9f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1F9F6	10220 bytes
SHA-256: `85f47908a0cc115411de3a022616c904edb1ab3307232b45da751c4eba5f55db`
`font_02_sfnt_off0002110a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2110A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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