PDF malware analysis — malicious · 227620f9c0504f25

MALICIOUS

PDF

81.9 KB Created: 2021-09-03 17:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 9385648e13eb793f3d6027a68f4fa028 SHA-1: 673e7a684d857d8905341c646d912f66f12446eb SHA-256: 227620f9c0504f252b93cdbd7a058f660592e6c29424ad0447f1ed01c0e1bbba

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a phishing or link-farming campaign. The embedded URLs likely lead to malicious content or credential harvesting pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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://synerhu.ru/uplcv?utm_term=agptek+cassette+to+mp3+converter+manual PDF link annotation
- https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ab137fe85---vidomukug.pdfIn PDF document text
- http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/pubepugadibixos.pdfIn PDF document text
- http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609101367f7fe---42489649178.pdfIn PDF document text
- https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/c227e50c04038aa5733a80cf2452b2ec/74538630553.pdfIn PDF document text
- https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/ec781ded0b4af7627b973b8e7cf92a07/gutapupukodonejolekekibot.pdfIn PDF document text
- http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161095bc437f63---duposaxoj.pdfIn PDF document text
- http://sourceandsecure.com/uploads/userfiles/file/84673533285.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc496ab833e---26916407238.pdfIn PDF document text
- http://beachfirebrands.com/userfiles/file/80598959485.pdfIn PDF document text
- http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f2981957d---dobixuv.pdfIn PDF document text
- https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/08180170b9f870661704a84d8ff8a48e/74968128929.pdfIn PDF document text
- https://itexpertdog.com/upload/files/35405387993.pdfIn PDF document text
- http://kientrucqhouse.com/uploads/image/files/jokadot.pdfIn PDF document text
- http://phamtrangia.com/upload/files/kurorulinobuwunu.pdfIn PDF document text
- http://bundoreh.com/fckeditor/files/file/rijobadelu.pdfIn PDF document text
- https://clic-essc.ch/ck/ckfinder/userfiles/files/lazavomexedotakogixow.pdfIn PDF document text
- https://dcoderesearch.com/uploads/38415093019.pdfIn PDF document text
- https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/ec22b07d0140b64ec62cbea798edcd17/rilomogetibiruwejepal.pdfIn PDF document text
- http://takeacode.eu/user/d41d8cd98f00b204e9800998ecf8427e/file/76224954540.pdfIn PDF document text
- https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076a89a68262---41770483387.pdfIn PDF document text
- https://koratspring.com/upload/file/4313602111.pdfIn PDF document text
- http://for284.org/clients/7/74/7452b259410349f427184d5eaa48bde7/File/febelapexamibenuneterulon.pdfIn PDF document text
- http://jyjwqj.com/uploadfile/file///2021060402024913.pdfIn PDF document text
- http://jullien38.com/ressource/site-image/files/6745005529.pdfIn PDF document text
- http://sjhrz.com/images/upload/File/89647972887.pdfIn PDF document text
- https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/1fba208e9f3ac19ae57776aeac979a39/lofofazamamowipazorid.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_off0000db91.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB91	17120 bytes
SHA-256: `334533d3d324ab43a5d9036e3d6d6152b19996bcdb7ca1dccc922a1df5e55b4b`
`font_01_sfnt_off000107bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107BD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011fd4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FD4	11036 bytes
SHA-256: `d9e8ceaed804c539599b69e596bcd4bcbd79aeab8188dfb0066dad1d58e9dc1e`

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