PDF malware analysis — malicious · 388ff31e9bbfd39b

MALICIOUS

PDF

87.1 KB Created: 2021-08-01 02:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 0d7f29ccae25cba8451758f7e4b73ef8 SHA-1: 39a8b1bc36ece6c96ebbe91a5e3755dad6c05cd7 SHA-256: 388ff31e9bbfd39bf7646ce121a64cd563555cc3054fee5fba7d0e9d8d332ae1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing to multiple domains, many of which are associated with compromised CMS uploads. ClamAV detected this file as a phishing trojan, and ML classification strongly indicated maliciousness. The primary function appears to be redirecting users to potentially malicious content hosted on compromised websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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.
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://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/d0b3a5d15709068baf91a68b542ac115/lafixijakowageno.pdf In PDF document text
- http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608300458d4ae---8844422561.pdfIn PDF document text
- https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/f337482171a49f763176ebeeb4c52f0b/18836071394.pdfIn PDF document text
- https://victorybear-info.com/userfiles/files/90010015562.pdfIn PDF document text
- http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f05c5b9d1d3---84034696106.pdfIn PDF document text
- https://angelsstaff.com/uploads/file/9787221079.pdfIn PDF document text
- http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/80110227574.pdfIn PDF document text
- https://daotaolaixesontay.com/uploads/file/62161955080.pdfIn PDF document text
- http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c6b229fb7---loginoresuradavenusif.pdfIn PDF document text
- https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/eb590cf616f2fac2894416838ad965a6/guziviwawewajox.pdfIn PDF document text
- http://xlpe.net/Images_upload/files/jifubovagetewezapun.pdfIn PDF document text
- https://paron-rebondir.com/uploads/files/15832618241.pdfIn PDF document text
- https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/cd0d669ef1bb3c470424bf132bd84b96/95055999192.pdfIn PDF document text
- https://muguet.fr/sites/default/files/file/52706307951.pdfIn PDF document text
- https://arch.ua/ckfinder/userfiles/files/vafepefizofudikekisetesef.pdfIn PDF document text
- http://mtsskzy.com/userfiles/file/lupefenenejevotodadurege.pdfIn PDF document text
- http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8be30226d6---zopawivonekasibelejexu.pdfIn PDF document text
- https://cecprint.com/images/file/95815079312.pdfIn PDF document text
- https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/0d1423d7d785e408c18605fcd5f11b3b/86757808475.pdfIn PDF document text
- http://rockhouseschool.com/rockhouse/uploads/files/tojudikusabufuw.pdfIn PDF document text
- https://www.scmsgroup.org/ckfinder/userfiles/files/zagimabu.pdfIn PDF document text
- http://daonshop.com/files/fckeditor/file/57900466125.pdfIn PDF document text
- http://hotstamping.pl/files/file/memebifejifanejew.pdfIn PDF document text
- http://wjvanderheidedienstverlening.nl/uploads/file/dodawomefoniwuzesimilaju.pdfIn PDF document text
- https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/i88n0pgp1l8vnfd2aibsej3io4/3176726481.pdfIn PDF document text
- http://di-tech.kr/fckeditor/userfiles/file/gepujigumegadifawezaponas.pdfIn PDF document text
- http://cuatro-pr.org/sites/default/files/file/sogejaxuguworirolafumus.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=la+valse+d%27amelie+piano+sheet+music+pdf+freePDF link annotation
- 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_off0000eee2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEE2	17436 bytes
SHA-256: `f9a7f142e3eda25b61af266ef5888b322c4a240a06de6fcef6929ed86efdcd3a`
`font_01_sfnt_off00011ccb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CCB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000134e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x134E2	11040 bytes
SHA-256: `2018bab4ca6c8c14b9211bbc29e5d9e5cc8bb6e3bc0ae1f469874c2317c963fd`

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