PDF malware analysis — malicious · c8c012b17b5a3ce6

MALICIOUS

PDF

92.5 KB Created: 2021-07-31 06:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: e5b0ff55abf5464cd83a996753f926a8 SHA-1: 6675f2ca529c4a0b549bdab519d4c80ed2cc6dd4 SHA-256: c8c012b17b5a3ce614e47fcec55becf681655a951b0835285125fa3d69f4b83d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute phishing content or malware. While no scripts were directly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9746

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://geostudio.eu/userfiles/files/jafifakewajumikuxo.pdf In PDF document text
- http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a665671ac52---51307179610.pdfIn PDF document text
- https://doctornhospital.com/banglanews24/editorsfiles/files/reloloj.pdfIn PDF document text
- https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/f85jpjkp7kb9svvrfhffustvj2/2924192984.pdfIn PDF document text
- http://andrelandberg.com/userfiles/file/67035408207.pdfIn PDF document text
- http://udmvdpo.ru/images/files/78832820628.pdfIn PDF document text
- http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcd847ba2e---53041112226.pdfIn PDF document text
- https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/c4ssihotm9sl63lnm8gkq7v8hr/84593739708.pdfIn PDF document text
- http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9e37401c1---40259659052.pdfIn PDF document text
- https://postele-z-masivu.sk/ckfinder/userfiles/files/wagodixepa.pdfIn PDF document text
- https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8dad221d0---likifiwobipekobagetonetuw.pdfIn PDF document text
- http://sshs1962.info/clients/3/33/33dcd814b32da85629335a95ab3d0158/File/sumewoxikafezazutole.pdfIn PDF document text
- https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/f3b1769f5ad08253ec87a17b8333e512/peporabunitakuzotoxe.pdfIn PDF document text
- http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b54cb9c0b6b---sedif.pdfIn PDF document text
- https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/in68r1kjjv2clm6kj962kjhmhs/tidolasipexanefadawene.pdfIn PDF document text
- https://evergreencans.com/userfiles/file/kirozometodonemobisar.pdfIn PDF document text
- http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a11522002d1---76314488780.pdfIn PDF document text
- http://baodieptailor.com/uploads/2021-06-26/images/files/9005615778.pdfIn PDF document text
- https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/f14d1e1e3cec269dc64b4ea0715f9db4/21636949516.pdfIn PDF document text
- http://heibldr.hu/FCKfeltoltott/file/tunifolawe.pdfIn PDF document text
- https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/7796aeb801dd963da05fe26125e76cef/gewurirufopowizope.pdfIn PDF document text
- http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/39gpbf9cbgtpcqbm5gfs201d6k/13629519906.pdfIn PDF document text
- https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ac297b249---9475866041.pdfIn PDF document text
- https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a56e72038---gitojalasijokenegur.pdfIn PDF document text
- https://nuttydog.hu/ckfinder/userfiles/files/kijitofexewim.pdfIn PDF document text
- http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608a989ce2abf---74383002024.pdfIn PDF document text
- https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa7d2a6eac---44339159096.pdfIn PDF document text
- https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb2f95e90f---92066230892.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=hypnose+le+mans+tarifPDF 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_off0000e98b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE98B	17436 bytes
SHA-256: `328bdee172bf0603c2b2d82a79da903515aba334ab8ac4ebda5cf8abd04e23af`
`font_01_sfnt_off000102b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102B9	10624 bytes
SHA-256: `ab50832e859d421c7f4dede35a5fdf72ec1dc1e44a189fe2e2baa63c049303b2`
`font_02_sfnt_off00011afa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11AFA	18920 bytes
SHA-256: `f4066ce09897c98d5913ffc5f435ae14c339580931ba72040a71d90f4dc230e9`
`font_03_sfnt_off00014aa5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14AA5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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