PDF malware analysis — malicious · a5fcb65b68faa9a0

MALICIOUS

PDF

68.1 KB Created: 2021-09-04 10:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 1af8f8e1b856c73e48826f57b9b22f66 SHA-1: c8b4e8bbf985721bfc78d5a1bd523d6cd000fd59 SHA-256: a5fcb65b68faa9a0ab4cfb00f29646d2f15ecf9b35564fb3e30dc6d02a3466fa

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code. The file also features a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. ClamAV detection as Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 further confirms its malicious nature, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.5605

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://smidgel.ru/uplcv?utm_term=puff+pastry+dessert+recipes+pdf PDF link annotation
- https://fontaine-eva.fr/userfiles/files/12796675338.pdfIn PDF document text
- https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16121cda3721c0---36187980813.pdfIn PDF document text
- http://wadirumshootingstars.com/userfiles/file///55896411829.pdfIn PDF document text
- https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1611c58ad10837---77406107384.pdfIn PDF document text
- https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f50eea4621---2717618122.pdfIn PDF document text
- https://www.santaterezinha.com.br/js/ckfinder/userfiles/files/nubojesowiravizofo.pdfIn PDF document text
- http://autoscuolauniversale.it/userfiles/files/morojobexovoteviw.pdfIn PDF document text
- http://andrewsexes.org/clients/867461/File/84340980217.pdfIn PDF document text
- https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48274b554b---7294436459.pdfIn PDF document text
- https://gikguamerica.com/userfiles/file/2888557623.pdfIn PDF document text
- http://driver-jazda.pl/upload/file/47430487787.pdfIn PDF document text
- https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a64650cdcc8---71988326939.pdfIn PDF document text
- http://mansiya.com/uploadfile/files/15929244021.pdfIn PDF document text
- https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1251dc537---5549662494.pdfIn PDF document text
- http://phongthuydotho.vn/upload/files/ravutekikejojosoloku.pdfIn PDF document text
- https://pacpartner.net/images_client//imagesfile/64618167254.pdfIn PDF document text
- http://lobi.md/userfiles/file/tibimigelobutube.pdfIn PDF document text
- http://polyalpan.hu/_user/file/13114683.pdfIn PDF document text
- https://psystat.net/candyticket/uploads/page_images/files/70836563594.pdfIn PDF document text
- http://szao-spb.ru/images/news/file/jegaxarokozexanuxadadir.pdfIn PDF document text
- http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161055bb3893df---8355623440.pdfIn PDF document text
- http://insidethedigitaltrend.biz/userfiles/file/41204549864.pdfIn PDF document text
- http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff392d9421---rorimigikepulukitiwovi.pdfIn PDF document text
- http://www.aadhar-interior.com/userfiles/file/lewavel.pdfIn PDF document text
- http://sparkpro.lv/content/file/98476212454.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_off0000bbc0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBBC0	16584 bytes
SHA-256: `ac4041cae913a022a4ee7f49f0f4c988c75f18576d1305ecc5d2af5530baf555`
`font_01_sfnt_off0000e64f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE64F	10556 bytes
SHA-256: `cbc3510968dd398c6ebec9360c20a70aeb24b9c05aa2e6688fedc8281f03c917`

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