PDF malware analysis — malicious · 77fa02d3921ddc0d

MALICIOUS

PDF

70.3 KB Created: 2021-06-26 03:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: ea0eea522633b6030db1b133ceb25253 SHA-1: 29614f5e78b61dcaa1eba9f7664879048b014474 SHA-256: 77fa02d3921ddc0d1fb4281d9d1f91e7a1510c3f9d169ffca32604255dba951e

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting it functions as a link farm to distribute malicious content. The presence of external URIs and link farm heuristics strongly points towards an attempt to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.5901

Heuristics 5

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
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://laborke.ru/uplcv?utm_term=what+does+dwbi+mean+in+texting PDF link annotation
- http://ed-web.cz/userfilesfile/53116916827.pdfIn PDF document text
- https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/dc3ffaa0becfad8c0939f0f7333f48dd/62434255316.pdfIn PDF document text
- http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096956d3a919---13030343869.pdfIn PDF document text
- https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918c4ed8ee5---motojagede.pdfIn PDF document text
- http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160848ccd4530c---96753913137.pdfIn PDF document text
- https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/vmo1j51jvp7h4euejpahe2ipm4/nixonuj.pdfIn PDF document text
- http://bafiti.com/sklep/userfiles/file/72342275707.pdfIn PDF document text
- http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86a748ae49---tuwonaxasumowo.pdfIn PDF document text
- http://proxima-design.cz/files/file/lomokavutuzug.pdfIn PDF document text
- http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609d07795f04b---51234413350.pdfIn PDF document text
- https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/b6f80d7177a9167a0d592071bad0313b/liwir.pdfIn PDF document text
- http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbbd9c8c20---gudozekom.pdfIn PDF document text
- https://powermailer.in/userfiles/file/10521459587.pdfIn PDF document text
- https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/55f70ce718485a8d86c7f5253f9bb53d/37642703873.pdfIn PDF document text
- https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607339de2807a---64415630452.pdfIn PDF document text
- https://hasekei.jp/userfiles/file/58603135342.pdfIn PDF document text
- https://bwawarszawa.pl/upload/file/20101924402.pdfIn PDF document text
- https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/2up4leqfq1mlrpui1jr1mvb6lf/63911286672.pdfIn PDF document text
- https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160895914c59e7---75734030793.pdfIn PDF document text
- http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/77c42na7gekn2anb6m4llsnnk7/48043282561.pdfIn PDF document text
- http://fullcolorspandoeken.nl/userfiles/file/riboxetefusetazemulet.pdfIn PDF document text
- http://dambi.pl/userfiles/file/mifakigitisivitiwi.pdfIn PDF document text
- 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_off0000e255.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE255	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fa6c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA6C	10868 bytes
SHA-256: `01976fcf5ced73195629730a2fbffc592df76e0d96426761b617b7260a8582b2`

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