PDF malware analysis — malicious · 76f91f9444daa9c3

MALICIOUS

PDF

76.6 KB Created: 2021-07-07 02:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 6247c0350e60b506221b029aa8e3f72e SHA-1: 84e00c566d4241ee4999a1e773694f7f1549ed5b SHA-256: 76f91f9444daa9c38c8ff26bb31691c20a56e6d64746c0058395a92f07560b04

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress sites and other unknown domains, suggesting it functions as a link farm. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9885

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 http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3708177351.pdf In PDF document text
- https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/d66f13b4041b81ed0020a77d9157e3b4/tenol.pdfIn PDF document text
- https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/3a1889cfd144424a7ce4da2d420d9c3b/dazomuxadesajolopux.pdfIn PDF document text
- https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/ee6c939e198b8703402fe72731566ffc/60607419189.pdfIn PDF document text
- http://ifaistos.reality.gr/~triantaf/images/file/xitiperefutewe.pdfIn PDF document text
- http://gintaras.cz/userfiles/file/24832778022.pdfIn PDF document text
- http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b625f254b---xikajedigipatexamodupud.pdfIn PDF document text
- http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6cbdaceaf---tilamutexejisagoto.pdfIn PDF document text
- http://csptech.net/admin/userfiles/file/55848274118.pdfIn PDF document text
- http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160a8efcf3fad4---lamajoj.pdfIn PDF document text
- https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/db8bbf0qcrh4ir00hjc0sj0ghu/31564656457.pdfIn PDF document text
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16099cc6537756---60446337571.pdfIn PDF document text
- https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/6a5cqoaaf4un695lgfrfpidlq5/vulenewogorasa.pdfIn PDF document text
- https://dbjadow.pl/attachments/file/68809865528.pdfIn PDF document text
- https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/3ffde8bbbf5bb2d6f953fbba06ef4afd/24875879786.pdfIn PDF document text
- https://tisuputih.com/contents//files/rojivirabudisoxoz.pdfIn PDF document text
- http://614move.com/clients/4890/File/82635845410.pdfIn PDF document text
- https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c96436e07b---63052932225.pdfIn PDF document text
- https://mlmrockstars.com/ckfinder/userfiles/files/gefilakadevuliwurin.pdfIn PDF document text
- https://eviinstall.com/userfiles/files/pamakajovo.pdfIn PDF document text
- https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/371a9837d9c17824db6773b7ebbb9a93/visarab.pdfIn PDF document text
- https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/qoce2ep9mr4h5l9ji3lv155jnc/wobeni.pdfIn PDF document text
- http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc66f1c10b---zevixozagiz.pdfIn PDF document text
- https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/oqgjfsaipthm2q3v90kicn2gf9/voxesagi.pdfIn PDF document text
- http://helder-effect.nl/userfiles/file/jopawesuribuxuxu.pdfIn PDF document text
- http://geredekombiservisi.com/userfiles/file/nufube.pdfIn PDF document text
- https://tanthueviet.vn/img_data/files/84758893909.pdfIn PDF document text
- https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb577a1390---kelufolav.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=standard+operating+procedure+for+distributionPDF 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_off0000c864.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC864	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e076.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE076	16780 bytes
SHA-256: `ddb52496ab5f7c347facc87b62adbf6d11d69605923c2b5683564bde266fcd69`
`font_02_sfnt_off00010b56.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B56	11064 bytes
SHA-256: `40286cc122669baca5a9e8cdd65b05ca102d2d470860db6d008edb97921229fa`

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