PDF malware analysis — malicious · 5ffe5c3451cce28e

MALICIOUS

PDF

73.5 KB Created: 2021-09-04 18:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 44be0f511cedb114ef801bef4aa5e928 SHA-1: ca45c89c23c653ab2748dee632801fec8c0ec2be SHA-256: 5ffe5c3451cce28ee9074808a40b341e093b396bb14c4c9b48e7f1397724ce63

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV, specifically as a phishing trojan. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised WordPress installations. The presence of these links suggests an attempt to lure users to potentially malicious sites, aligning with phishing or malware distribution tactics.

Machine Learning

Nyx PDF Classifier suspicious score 0.4750

Heuristics 5

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
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://dhesient.com/media/49876038316.pdf In PDF document text
- https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160918ef97ab7e---suwefuzofojaru.pdfIn PDF document text
- https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607150bfc608a---72247290392.pdfIn PDF document text
- https://www.nitdgp.ac.in/uploads/userfiles/files/32002459831.pdfIn PDF document text
- https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/6a37c317189e3fc91bc13e4d650e8cae/18427729441.pdfIn PDF document text
- http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab8237579a---50227755029.pdfIn PDF document text
- http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac42ba97e19---niponetagugavop.pdfIn PDF document text
- http://dlzj.net/upload/files/20210529035958189648.pdfIn PDF document text
- http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a839582ad45---tiruruz.pdfIn PDF document text
- http://randalljroutson.com/clients/44711/File/58080894322.pdfIn PDF document text
- http://co-wemart.com/careeruserfiles/file/31379325788.pdfIn PDF document text
- http://aimecostruzioni.it/userfiles/files/51653389468.pdfIn PDF document text
- http://gabortech.com/admin/file/25974126040.pdfIn PDF document text
- http://heldermusic.nl/ckfinder/userfiles/files/25495633961.pdfIn PDF document text
- http://119pump.net/d/files/jepewe.pdfIn PDF document text
- https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/2e94ecc0fca712e33473de48ef2a5b5a/teponunudivijetibu.pdfIn PDF document text
- https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/880b7f3753b7b2a1d71b5bbf4ab7744e/kirake.pdfIn PDF document text
- https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/e053aa519934752f5ff54f3e383116b4/naroxolozukebebenejidasa.pdfIn PDF document text
- https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/27ead485caa32319ab0d359789447170/raxoxotubopa.pdfIn PDF document text
- http://fsoa.cn/userfiles/file/48994049838.pdfIn PDF document text
- http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9898749dd---75486199491.pdfIn PDF document text
- https://go2germany.ru/files/file/326160716.pdfIn PDF document text
- http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161169166bdb57---61789183724.pdfIn PDF document text
- http://oicenglish.com/imagexx/files/jalisezidalufose.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=ecology+pdf+free+downloadPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d547.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD547	10620 bytes
SHA-256: `a64f95195d65eeb168f948dee2557766f8db606ba446ef9f1999e619c99b5fc3`
`font_01_sfnt_off0000ed90.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED90	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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