PDF malware analysis — malicious · 066d04062590b174

MALICIOUS

PDF

81.4 KB Created: 2021-09-15 23:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: bbc0f521065db69c11d1f12289400e3b SHA-1: 60852e1990348c2b9318a9c0b8f988cd821cd4c5 SHA-256: 066d04062590b17432090d5ce6a5d56e192e759a3a0e8db46f9882e3f1388117

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains or compromised CMS uploads. The presence of embedded JavaScript and a high ML classifier score, combined with ClamAV detection as Pdf.Phishing.Trojan, strongly suggests a malicious intent to redirect users. The primary goal appears to be directing users to external sites, likely for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

Heuristics 7

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.
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
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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://drafthe.ru/uplcv?utm_term=pubg+sensitivity+settings+android+2021 PDF link annotation
- https://nikunjfoundation.org/ckfinder/userfiles/files/jutawiwemow.pdfIn PDF document text
- https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/ujktr1bc6g40tub35qebemvdts/30436674032.pdfIn PDF document text
- https://astoraccessories.com/uploads/ckfinder/files/11408530254.pdfIn PDF document text
- http://opuspointpartner.com/ckfinder/userfiles/files/wojadi.pdfIn PDF document text
- https://fultoys.com/userfiles/76990784542.pdfIn PDF document text
- https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380aa7b6df7---kezurogewekaforibovev.pdfIn PDF document text
- http://rzn-house.ru/upload/file/rupetumirivizijewagobujes.pdfIn PDF document text
- https://dcimx.com/files/larewuxakaridal.pdfIn PDF document text
- http://edeins.com/userfiles/file/jotigoj.pdfIn PDF document text
- http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/jesudabew.pdfIn PDF document text
- http://kitpaisal.com/mypicture/file/3176058587.pdfIn PDF document text
- http://abovomedia.hu/_user/file/7244188901.pdfIn PDF document text
- https://www.asoriofrio.org/ckfinder/userfiles/files/38980212584.pdfIn PDF document text
- https://pre-www.bridge-college.com/uploaded/ckeditor/files/50972484790.pdfIn PDF document text
- https://cjsc.se/ckfinder/userfiles/files/27622820935.pdfIn PDF document text
- https://livres-arts.com/ckfinder/userfiles/files/76527614422.pdfIn PDF document text
- https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/tq2rql2bmnhb56g41qsu4l6gr7/todinugogijufefelarime.pdfIn PDF document text
- http://peach2560.xyz/js/ckfinder/userfiles/files/fapebalevupipepix.pdfIn PDF document text
- https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/21c7000637d4c3e46219e07e328c3c6c/jabap.pdfIn PDF document text
- https://anmimar.com/royal/userfiles/file/ditezekeluko.pdfIn PDF document text
- http://france-ex.com/images/blog/file/mofugiluranifo.pdfIn PDF document text
- https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/6171e8ed6f1861615886cdb7e08f6217/mozazopod.pdfIn PDF document text
- http://tachikawa-derma.biz/ckfinder/userfiles/files/koporimosativupojemewet.pdfIn PDF document text
- http://veterinariacomportamentale.it/userfiles/files/faxapif.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In 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_off0000d55a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD55A	18816 bytes
SHA-256: `6af9017fb71d6ef3fd1dfb75b60abc2c928068790fd2603ea645c4efe957c18e`
`font_01_sfnt_off0001060a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1060A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011e21.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E21	11092 bytes
SHA-256: `c15254401baa83e0fbd4a02f855916fb852d4386b2c5941670bc07c78b9d8866`

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