PDF malware analysis — malicious · 07e62f4e0f80500d

MALICIOUS

PDF

73.7 KB Created: 2021-09-04 12:37:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: ad080127202e8e882fabf9a55bdc2632 SHA-1: ab9c698df2d244521504e487680815a2d7554bb7 SHA-256: 07e62f4e0f80500db0955834d5f13afa31153e12eb6f53d1918a56adacff97ee

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports its role in distributing malicious content or directing users to phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9914

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://crewmak.ru/uplcv?utm_term=adding+and+subtracting+polynomials+activity+pdf PDF link annotation
- http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16093d0ad44367---fezugisumujowedexati.pdfIn PDF document text
- http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085d8f03bc60---zokepojarudoruwipu.pdfIn PDF document text
- http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a61c4a7286---kodesavojuvoleki.pdfIn PDF document text
- https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/6fc9f4864698a65c2fbddcdc5b8976ea/roduwilurituru.pdfIn PDF document text
- http://agiusfuneraldirectors.com/files/file/xeneguwiroduxilefodazu.pdfIn PDF document text
- https://angkorphotographyguide.com/userfiles/file/gamidifaluteloredagedale.pdfIn PDF document text
- http://tonioloclaudio.it/userfiles/files/lugasamevuledegifedon.pdfIn PDF document text
- https://yennenga.org/business_school/uploads/file/redexivigaxija.pdfIn PDF document text
- http://k-souz.com/userfiles/file/jifawe.pdfIn PDF document text
- https://icon-studios.com/userfiles/file/5420122498.pdfIn PDF document text
- https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/e72fc55b6e804559cd65841aee9e1ced/64590568459.pdfIn PDF document text
- http://puzynowska-kancelaria.com/userfiles/file/27940826398.pdfIn PDF document text
- https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/sakexajovu.pdfIn PDF document text
- https://curryleafharleysvillepa.com/hang/userfiles/files/lobimoladejovigupabex.pdfIn PDF document text
- https://ivanamihic.com//files/sijodezuxumesolutafit.pdfIn PDF document text
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/6bba7105d6bb2ec1190d840f5dd71004/terajigujo.pdfIn PDF document text
- http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/ngho9cns0mjut32sm69l5s2d2q/55374835081.pdfIn PDF document text
- http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081cf69c043b---27116765480.pdfIn PDF document text
- http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa37b0a0b39---1833195572.pdfIn PDF document text
- https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087b910c33aa---58476025584.pdfIn PDF document text
- http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833aece5cb2---funurogopavuxopo.pdfIn PDF document text
- http://massiimo.com/piceditor/file/41810459446.pdfIn PDF document text
- http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16121af5f7e9a6---73089839202.pdfIn PDF document text
- https://cncunse.com/d/files/sarutezoziweko.pdfIn PDF document text
- http://fotografieindex.nl/images/uploads/zewajebuvojevegudasexot.pdfIn PDF document text
- http://ifap.it/images/file/20328376832.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_off0000bf7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBF7F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d791.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD791	15540 bytes
SHA-256: `5ba08ae945b3713bd53e42e1c1da463b167050c4efbb89e362035000eb48f935`
`font_02_sfnt_off0000fec1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEC1	11232 bytes
SHA-256: `bddaa7b79cb90dae3c234070bc23d15f8444bbb660a804376ca75d5aaa9116cc`

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