PDF malware analysis — malicious · 5cc145c4052828ab

MALICIOUS

PDF

83.2 KB Created: 2021-07-20 11:14:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: e58f2cdd6203ecca235e265301cadad8 SHA-1: c92a3c2892dc8af46b801f00e3183ce4a99c5c03 SHA-256: 5cc145c4052828ab7f1fff5c0b01602813fddf7dcb3101ed4fb2d3e31ce50442

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm with numerous URLs pointing to other PDF files, many hosted on compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO abuse. The file's structure and numerous external links suggest it's designed to redirect users to malicious content rather than providing direct information.

Machine Learning

Nyx PDF Classifier malicious score 0.5181

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://valeneighbors.com/userimages/sumagez.pdf In PDF document text
- https://tsafar.ir/basefile/tsafarir/files/55888890582.pdfIn PDF document text
- https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/a2p1ms5vippphivfsfmk00fe8v/67011953132.pdfIn PDF document text
- http://hyperasp.net/userfiles/file/36854527910.pdfIn PDF document text
- https://picinterior.com/ckfinder/userfiles/files/dodakob.pdfIn PDF document text
- http://dataction.org/demo/dataction/media/85515653256.pdfIn PDF document text
- https://palcev.ru/userfiles/file/80793150688.pdfIn PDF document text
- https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/bc0a4ad624adf3f1454c5ff001c7248e/42811235271.pdfIn PDF document text
- http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kumoz.pdfIn PDF document text
- http://sostrevalli.it/userfiles/files/99716933542.pdfIn PDF document text
- http://webcertain.net/contentupload/fckeditorUploads/organization_/file/janigerikuxug.pdfIn PDF document text
- http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/kanuzobe.pdfIn PDF document text
- http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/vks6d1t8h1v10f6m62enfgqv04/dilusemadagojenuwulito.pdfIn PDF document text
- http://balogmihaly.hu/UserFiles/file/zigububavafozakeral.pdfIn PDF document text
- https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/08c1f775638a88c4a7afef4c6237e64d/40232795419.pdfIn PDF document text
- https://lemanssrl.it/file/2797613509.pdfIn PDF document text
- http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83ed7207ca---jilisitupawobodemisemim.pdfIn PDF document text
- http://mfcwestenkwartier.nl/beta/userfiles/file/14991419215.pdfIn PDF document text
- http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c88674ac9db---27294323207.pdfIn PDF document text
- http://shuswapladystriders.ca/userfiles/file/13251099381.pdfIn PDF document text
- http://studiocommercialedelpiano.it/userfiles/files/pekejutakonan.pdfIn PDF document text
- https://greenfuturevietnam.com/Upload/files/67343855687.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=roots+to+factored+form+calculatorPDF link annotation
- 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_off0000eba9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBA9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000103c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103C0	10584 bytes
SHA-256: `f440392fdd6d2225ceb1c333d230debbbdc9b7f8aa5b3afb1515567e4f9712aa`
`font_02_sfnt_off00011c04.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C04	17060 bytes
SHA-256: `f1c009f54fab105a2a0c78037dc929e23c51d71a24311f27e9a402b44a2d9467`

Open this report in the interactive analyzer, or submit your own file for analysis.