PDF malware analysis — malicious · 40cf6666bcf3fded

MALICIOUS

PDF

120.7 KB Created: 2021-07-31 13:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: e3225b7e4d524f16f8f0b6c4d4fac348 SHA-1: 4f38ce3e59cc33553fc3ff913695e5f1718f5991 SHA-256: 40cf6666bcf3fdeda9332d7f24e81f926d3c7e53e7417b730cbc53ac1585a5db

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised websites. These links are likely intended to lure users into clicking them, potentially leading to phishing pages or further malware downloads.

Machine Learning

Nyx PDF Classifier suspicious score 0.3704

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://biometria.pl/photos_fck/file/xedotesajujiwuxamisixa.pdf In PDF document text
- http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e48eb6e9d4---xadofaso.pdfIn PDF document text
- http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e95982b6c13---82037128581.pdfIn PDF document text
- http://espokebar.com/uploads/files/3639183950.pdfIn PDF document text
- https://mzr-avocats.com/buddha/ckfinder/userfiles/files/57345001297.pdfIn PDF document text
- http://saikunghouse.hk/userfiles/93794024097.pdfIn PDF document text
- http://studiotecnicolari.it/userfiles/files/42645394629.pdfIn PDF document text
- http://uforoi.com/app/webroot/uploads/files/99801756106.pdfIn PDF document text
- https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/d8ab32bf058ef6c37bd5593dca486289/78444243012.pdfIn PDF document text
- https://grnca.org/img/files/files/78595154067.pdfIn PDF document text
- https://al-farh-iq.com/upload/userfiles/file/xivetexekupixerobu.pdfIn PDF document text
- http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961a2071867---zaxujifipimexo.pdfIn PDF document text
- http://haverfordhigh77.com/clients/e/e7/e7c5a96ea35a64a1345a575153f12e7e/File/66055337577.pdfIn PDF document text
- http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ccc685ac8---82513491537.pdfIn PDF document text
- https://markyatirim.com/resimler/files/rojilomovuxesonamoru.pdfIn PDF document text
- https://master.plus/wp-content/plugins/super-forms/uploads/php/files/5a3dba084ae0772def203ac2307b52d4/mekerazete.pdfIn PDF document text
- https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/5b4d87c69vjgmer53cm7u05fkd/risirekerexupakejukasuwub.pdfIn PDF document text
- http://learningkey.org/userfiles/xodijobimija.pdfIn PDF document text
- http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/e5fbc55a3c8105275c42810e49f2b26d/60215498793.pdfIn PDF document text
- http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/f29d9842fa88db2875972936b0d98cd3/fifovodixatofivido.pdfIn PDF document text
- http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/3171f287a9d7f52c84d5d24a1d18c348/kexegirivomogibaximono.pdfIn PDF document text
- https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e0e369f2f---47114755929.pdfIn PDF document text
- http://kursadowicz.pl/Upload/file/riranok.pdfIn PDF document text
- http://www.vljainandco.com/userfiles/files/vuzoteso.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=irs+section+125+nondiscrimination+testing+worksheet+2020PDF 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_off0001995e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1995E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001b175.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1B175	11328 bytes
SHA-256: `99690c93074acd0660364adadf02dd518be78aaed47d5826ac9167c13f050c60`

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