PDF malware analysis — malicious · a290c6b5430059f1

MALICIOUS

PDF

87.4 KB Created: 2021-06-27 19:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 334e14ad66d6ff6e864b6ab4f8d3bf6b SHA-1: 8b3f6571ddaeed549079c7a1554dc781975e15a5 SHA-256: a290c6b5430059f18445baf1ad9e2ab2ce7e2433c27497ff2f879edc93fad846

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content or phishing sites. The file's structure and URL patterns are consistent with a phishing or SEO poisoning campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://coretry.ru/uplcv?utm_term=online+gambling+sites+free+bets PDF link annotation
- http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/fuvasemomenezomonevupak.pdfIn PDF document text
- http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a6531503d---nirosireboxigin.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e74cc70477---xosezawopuvirexe.pdfIn PDF document text
- https://bdblue.com/ckfinder/userfiles/files/59302170557.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac010d0841---fobeletujaxigiviz.pdfIn PDF document text
- https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/apfbj967krsvf05qdoskq3qsl1/96063986378.pdfIn PDF document text
- http://hasici-pristroje-eshop.cz/files/file/repunalakizojunufimux.pdfIn PDF document text
- https://telewebmarketing.com/FCKeditor/file/lopoleneguvavox.pdfIn PDF document text
- http://caratow.nl/userfiles/file/zawimujigijoxojugubix.pdfIn PDF document text
- https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/c45068c2504ecdf77bc91e1a0bff09d9/pujajalosupajopumepuziza.pdfIn PDF document text
- http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab430176dc7---bipukujotixugu.pdfIn PDF document text
- https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f6e81df77a53a95ecddab96db399e98e/4127113846.pdfIn PDF document text
- https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16096722b452fd---20594795758.pdfIn PDF document text
- http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16089011780978---25695605728.pdfIn PDF document text
- https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/qt0h1g3v2cl92bfvs7bgevdj04/32898079852.pdfIn PDF document text
- http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b647354cf73---tigutefisopopofa.pdfIn PDF document text
- https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fa76191e2---gezukig.pdfIn PDF document text
- https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/68f297552a5f289d8e66c18b733393ec/51717205700.pdfIn PDF document text
- http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160bf88935313e---kesofisukisikevebelofuw.pdfIn PDF document text
- https://toskov-yordanov.com/userfiles/file/43303742068.pdfIn PDF document text
- http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160860b2c39f2a---sixavivajiludaju.pdfIn PDF document text
- http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5a5d6ab79---numuvanilotivujokutok.pdfIn PDF document text
- https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075658e45058---xotijasixilereka.pdfIn PDF document text
- http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770a573f754---60411025317.pdfIn PDF document text
- http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16087bd867ef70---92124122463.pdfIn PDF document text
- http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/02671d002213c92a887e2aa9a03df276/xinujipabobipok.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_off0000f1d8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1D8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000109ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109EA	17680 bytes
SHA-256: `2b6fad2c90c5884d545097513620e3b86df8652d7ec8386958dd22b6bb749a76`
`font_02_sfnt_off00013810.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13810	10600 bytes
SHA-256: `a79ae04a2f46ebf15dad324fda2aacec0ff3d39025f04453f36bc1721778908b`

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