PDF malware analysis — malicious · ca6aa7fa2449a921

MALICIOUS

PDF

78.0 KB Created: 2021-09-12 21:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: dbf2f7ed13e12a7931b7466ffd2e2dd5 SHA-1: 91c4797b96b8c530e4054204984de6db1a698603 SHA-256: ca6aa7fa2449a92177ef27335a0f7f3f2fac60ff9ecfc5a5c4fac71ae2bab207

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV, indicating it is likely a phishing or trojan distribution vehicle. The document contains a large number of links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and embedded URLs further supports the attack pattern of luring users to external sites, likely for malware download or credential harvesting.

Machine Learning

Nyx PDF Classifier suspicious score 0.4750

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://coretry.ru/uplcv?utm_term=super+singh+movie+free+download PDF link annotation
- http://cablexconsulting.com/Upload/file/64406969107.pdfIn PDF document text
- http://bociany.sk/media/file/buzirajulirobipavatowukel.pdfIn PDF document text
- http://briquettemachinery.com/d/files/fodufinuponuwe.pdfIn PDF document text
- https://discovercefalu.it/_data/images/file/berubaluremuz.pdfIn PDF document text
- https://highlander-inn.com/assets/userfiles/files/tepuvituvivuxejubogawulav.pdfIn PDF document text
- https://nacionalequipamentos.com/ckeditor/uploads/files/75267131271.pdfIn PDF document text
- http://lagrupacio.cat/file/70869860978.pdfIn PDF document text
- http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5301744467.pdfIn PDF document text
- https://skyzoan.com/cake/beta/userfiles/file/vikati.pdfIn PDF document text
- http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/161354544a77f2---galuwutumuzidaso.pdfIn PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161365748ac9a5---72278508056.pdfIn PDF document text
- https://hantverksakuten.se/ckfinder/userfiles/files/27800542800.pdfIn PDF document text
- http://istanbulballoons.com/ckfinder/userfiles/files/zemabojo.pdfIn PDF document text
- https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/438ab7a8e95d61ffbf1194f4cc02f458/87004098139.pdfIn PDF document text
- https://www.xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/tibagekobe.pdfIn PDF document text
- http://telecycling.org/files/file/litinazixekan.pdfIn PDF document text
- https://bednidhitraders.com/userfiles/file/85029787243.pdfIn PDF document text
- http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/kiliraximutafori.pdfIn PDF document text
- https://marbletreasures.com/uploads/image/files/mifotenewogud.pdfIn PDF document text
- http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138402cca8b9---jalipo.pdfIn PDF document text
- http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613dcdbd956e4---gedusepodere.pdfIn PDF document text
- https://www.gullyracing.it/admin/ckfinder/userfiles/files/mafazitefokenuvinuvabaw.pdfIn PDF document text
- https://extremedriveline.com/ckfinder/userfiles/files/36246007649.pdfIn PDF document text
- http://ingegneriarossi.it/userfiles/files/65825146042.pdfIn PDF document text
- https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/pizugetejufo.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_off0000e514.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE514	17256 bytes
SHA-256: `52a8a83784b44dac81902d14e973993403f51e55862b37ab1eeda0cb5f99c603`
`font_01_sfnt_off000111cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x111CC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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