PDF malware analysis — malicious · e1f45ee00aaf43f9

MALICIOUS

PDF

120.0 KB Created: 2021-08-10 18:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21

MD5: 20489a77970fbd63a0d9d7982a441fd7 SHA-1: abe32598f344a9fbc8d62aac7fbe3d95698bcbb6 SHA-256: e1f45ee00aaf43f96cd6bac2110a39341ec9ca9c951ea72bee3a9b48a2b5927a

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to multiple domains, many of which appear to be compromised or disposable hosting, suggesting an attempt to obscure the final malicious destination. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or malware delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 0.5962

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://queure.ru/uplcv?utm_term=best+dps+class+in+neverwinter+mod+18 PDF link annotation
- http://cesishotel.lv/res/wysiwyg/file/rezadevekalifuwixu.pdfIn PDF document text
- http://hitecds.com/userfiles/file/sidesabu.pdfIn PDF document text
- http://laiksmodalux.lt/app/webroot/uploads/userfiles/files/82238086106.pdfIn PDF document text
- https://aterhesseg.com/up_image/file/luvodasukulibuka.pdfIn PDF document text
- http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/63538f0688f3d5458ce48edc84a21286/75612385666.pdfIn PDF document text
- http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/3430935572.pdfIn PDF document text
- https://culturasiapamplona.com/guiarte_userfiles/files/94312098909.pdfIn PDF document text
- http://ingmontagna.com/userfiles/files/90692840237.pdfIn PDF document text
- http://ateliergermain.net/sites/default/files/file/zidalatuwigexoxal.pdfIn PDF document text
- https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/43p0ogmp8cmri6814uoesugj16/75275040369.pdfIn PDF document text
- http://logistra.fr/ressource/site-image/files/rofugomuni.pdfIn PDF document text
- http://mikailang.net/userfiles/file/20210531235930_162751892.pdfIn PDF document text
- http://presssimayeshahr.ir/pic/file/65414869847.pdfIn PDF document text
- https://limsurempat.com/contents//files/mugob.pdfIn PDF document text
- http://tgtech-auto.com/userfiles/file/81340898139.pdfIn PDF document text
- https://xosobacninh.vn/webroot/img/files/62582681101.pdfIn PDF document text
- https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/44bd66f20eca76522fd2689b4e71457a/numuzirugotoxulexulunag.pdfIn PDF document text
- https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c64ac04b30---52501573723.pdfIn PDF document text
- http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c539e4edf---liretivimubuzutubat.pdfIn PDF document text
- http://supermarketdv.ru/files/file/rutawubabetepigagexe.pdfIn PDF document text
- http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/48d609292f51705228f95dcd3fe2efd4/2133832736.pdfIn PDF document text
- http://kraski-chernila.ru/resources/file/zasodojoxumif.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000187ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x187EF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001a006.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A006	11140 bytes
SHA-256: `12e6fd41df80f0b4245e212d5f62e78ff0403512c9dfb658aa0fc5ecb23783fe`
`font_02_sfnt_off0001ba27.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1BA27	17168 bytes
SHA-256: `6ce125711750dc132bf58ae8c8d3beb7f1eee18b91a603fdbf6a45f856adeb49`

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