PDF malware analysis — malicious · d9ecdf47d1a50489

MALICIOUS

PDF

74.9 KB Created: 2021-06-27 23:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: c1ad466af98685b8bd18b1b87972c286 SHA-1: 24e1c96b7d01198054844587f7333ecdea8ad57e SHA-256: d9ecdf47d1a50489915181f1c04590387b107eca395b7b25a2bad780a52aef6b

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV. Static analysis revealed a link farm containing numerous URLs, many hosted on compromised WordPress sites, suggesting an attempt to direct users to malicious content. The PDF document body is heavily obfuscated and unreadable, but the presence of embedded links and the ClamAV detection strongly indicate a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier suspicious score 0.4752

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://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d820b867c---zipegeda.pdf In PDF document text
- http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/2vb0sfn9u6a8mm5ihbpppsfoa9/wowij.pdfIn PDF document text
- https://edu-mate.kr/_UploadFile/Images/file/viporivanexidaz.pdfIn PDF document text
- https://fnb-concepts.com/images/uploads/files/29562749346.pdfIn PDF document text
- https://aterhesseg.com/up_image/file/51833089145.pdfIn PDF document text
- http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/leburaver.pdfIn PDF document text
- https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/nqno6fkp9ea1dsmka5vjedvp2v/80055044450.pdfIn PDF document text
- https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607371a30a1fb---jamesogel.pdfIn PDF document text
- https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/4360e1820a4f1e9670f5044982301103/13935607791.pdfIn PDF document text
- http://winterwonderlandzundert.nl/uploadimages/files/wuvuxajojepenelomeno.pdfIn PDF document text
- https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/9d60563102f4d2ac7dd40cc471d0dfdd/11435244411.pdfIn PDF document text
- http://www.klimavill.com//data/editorfile/nuxavumugujerak.pdfIn PDF document text
- https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/pne5dd65rqkta5g9s7h3on22j3/mireweroxedekabidafiza.pdfIn PDF document text
- https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761972398b4---55414992023.pdfIn PDF document text
- http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776b7584dc9---72316359233.pdfIn PDF document text
- https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160899d284d427---45940666362.pdfIn PDF document text
- http://www.520amis.com/upload/files/85409621585.pdfIn PDF document text
- https://myphi.biz/nbloom/fckuploads/file/77694109795.pdfIn PDF document text
- http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b75ddb1d5ec---ladapidibinotodusizat.pdfIn PDF document text
- http://aiswaryamatrimonials.com/fck_uploads/file/vujudejozugizefotizexuji.pdfIn PDF document text
- http://le-bouquet.be/userfiles/files/jowatukajikiva.pdfIn PDF document text
- http://madang.eu/f_pds/fck/file/87124953679.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/bd3c32ac600163ab31f232ab7a189127/7768896577.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=hibiscus+flower+with+butterfly+tattooPDF 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_off0000ef44.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF44	10760 bytes
SHA-256: `ddf9192f5a642a1f0645a7f9922d5372aff19b18eda553175de41e32da26c15e`
`font_01_sfnt_off0001083d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1083D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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