PDF malware analysis — malicious · df252cbbcfa63821

MALICIOUS

PDF

65.1 KB Created: 2021-09-01 05:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: a393f23c8ed3c4163083c1009335cb66 SHA-1: 78ef5994972894c311ac7b580b4fd7102acb49d6 SHA-256: df252cbbcfa63821a44013fbd21b12b62d1ed0ea6dfb758a4b4161ebbb1b4976

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating an attempt to distribute malicious content or conduct phishing. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with known malicious PDF droppers.

Machine Learning

Nyx PDF Classifier malicious score 0.6720

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 http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160887ebcd66a2---78910338467.pdf In PDF document text
- http://sinoscaform.com/upload/ckimg/files/202108220018468346.pdfIn PDF document text
- https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04f18cb5ac---91359111694.pdfIn PDF document text
- https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba59ee008---ramut.pdfIn PDF document text
- http://lagrupacio.cat/file/58828070223.pdfIn PDF document text
- https://motelandratecuci.ro/userfiles/file/7883891783.pdfIn PDF document text
- https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ud76ioq8v49v3uiu6i4h18toka/vanakufizupude.pdfIn PDF document text
- https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/9830153b0982694b3d0504de276c214f/gozowozo.pdfIn PDF document text
- https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/8sqhukvt1bcmlk52qa67gg9ds1/98057033697.pdfIn PDF document text
- http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cba7a3bb793---tinukelik.pdfIn PDF document text
- http://musiclivemarsala.com/userfiles/files/duletokoku.pdfIn PDF document text
- https://fiscalonline.eu/app/webroot/files/userfiles/files/71565677280.pdfIn PDF document text
- https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9ea44b498---ganifedut.pdfIn PDF document text
- https://santa.sg/images/users/00000000/files/44859880074.pdfIn PDF document text
- http://automotiveenergy.cz/userfiles/file/rijajemaxepijavifejofeke.pdfIn PDF document text
- http://zulaikhatextile.com/userfiles/files/zubavodujofapalotavefu.pdfIn PDF document text
- http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161012cba89fff---zelafatime.pdfIn PDF document text
- https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16086dc5545745---71206649844.pdfIn PDF document text
- http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3837e2c7cb---puturevobi.pdfIn PDF document text
- http://centromp.it/userfiles/files/49184410366.pdfIn PDF document text
- https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f36e3c725e---nufozikilutijo.pdfIn PDF document text
- http://a-aqua.fr/ressource/site-image/files/87127291451.pdfIn PDF document text
- http://cn-noah.com/uploadfile/file/500321943.pdfIn PDF document text
- https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/dabdbp3hsv9f7oq796s9stfm1q/nukimikexujinez.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=max+recovery+insanityPDF 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_off0000bc5d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBC5D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d46f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD46F	15956 bytes
SHA-256: `a99506ecc819d2eaa93f83003799f0292d2938c69dc9f2b0ae30196b1e43cf72`

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