PDF malware analysis — malicious · be162172fc5b57f4

MALICIOUS

PDF

78.1 KB Created: 2021-09-04 19:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: b0835377686cf37f2971d3c7ccb5b12f SHA-1: a1e5521a67f9837e316ebd59cf9140344d84b292 SHA-256: be162172fc5b57f4748f1848c17d4a3dd06bfbc233d1cbab706e96d5352f7f2c

132 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are then used to host further malicious content or phishing pages.

Machine Learning

Nyx PDF Classifier suspicious score 0.4578

Heuristics 6

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b32c0e6aa---26130509613.pdf In PDF document text
- http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d85be9210---32255879996.pdfIn PDF document text
- http://romanakladatelstvi.cz/userfiles/file/dibuxemadanasunidu.pdfIn PDF document text
- http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d50882299b8---58985760040.pdfIn PDF document text
- https://naucharts.com/ckfinder/userfiles/files/tonowenepeduno.pdfIn PDF document text
- http://volvo-cars.jp/js/upload/files/mosoxis.pdfIn PDF document text
- https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/e044d0e61ed3413de91c70eaea0175f8/38052464613.pdfIn PDF document text
- http://petukmahaaaraj.com/userfiles/file/53053734219.pdfIn PDF document text
- https://huaienclinic.com/uploadpic/files/41487126429.pdfIn PDF document text
- https://dineflon.com//files/pubesemafojuk.pdfIn PDF document text
- http://armanetti.com/images/wutubudagotijibobemova.pdfIn PDF document text
- http://eschool365.in/js/admin/uploadfiles/file/24506274711.pdfIn PDF document text
- https://an-professional.ru/img/files/file/62413523866.pdfIn PDF document text
- http://polymer-optix.de/userfiles/file/84478936702.pdfIn PDF document text
- http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16080fcdbd90b7---wovuneramexofonet.pdfIn PDF document text
- http://rapabzenec.cz/obrazky/files/73323194972.pdfIn PDF document text
- https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/e981818812c62eb289082fba08a8dc8a/76465908231.pdfIn PDF document text
- https://akproauto.net/nbloom/fckuploads/file/82137494185.pdfIn PDF document text
- http://nationalcoopadvisors.com/userfiles/files/gonamuzop.pdfIn PDF document text
- http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097026529ddc---3238592648.pdfIn PDF document text
- https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/803d0583df1bbd1290966dabb847c47c/47635587228.pdfIn PDF document text
- http://magooferta.pl/uploads/fck/file/zomatakaruxezup.pdfIn PDF document text
- http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16080d87b30b24---18409026324.pdfIn PDF document text
- http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d0b095499a2---35536544150.pdfIn PDF document text
- https://villatoscana-pi.it/userfiles/file/revibirilurut.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=markdown+preview+enhanced+pdf+cssPDF 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_off0000dd4e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD4E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f560.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF560	23468 bytes
SHA-256: `04c67beb04f669352d89e2e70f943a0714b16cb0b553ce62036efdd0001320a8`

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