PDF malware analysis — malicious · b907d79637e7330c

MALICIOUS

PDF

69.3 KB Created: 2021-09-25 08:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 68e54150e3d7c6e42812ab72629f890a SHA-1: f5bf8ce96ab4b62ccf9bceaa606ae9730bce5a63 SHA-256: b907d79637e7330c563cd2e19e7995ca1cda09d071dcd26b16e9c0ffff0d3321

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9849

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://svarovani-tig.cz/userfiles/file/dozomajesev.pdf In PDF document text
- http://beveragesgs.com/userfiles/file/jikaxoziponokezu.pdfIn PDF document text
- http://teakdeck.pl/files/file/dawarolofoduz.pdfIn PDF document text
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16134ea54b14c3---63750078937.pdfIn PDF document text
- http://seatraderhk.com/userfiles/73431753267.pdfIn PDF document text
- https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/fa588ae198053d885989ecc167a7bbf9/mejobu.pdfIn PDF document text
- https://telechips.com/ckfinder/userfiles/files/josogebofedit.pdfIn PDF document text
- http://videocycling.info/files/file/kunotisedakiz.pdfIn PDF document text
- http://kamakuralosgatos.com/uploads/files/28950071777.pdfIn PDF document text
- https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613558c15d772---detukoneta.pdfIn PDF document text
- http://canadapremiumlubes.com/survey/userfiles/files/72629525402.pdfIn PDF document text
- https://begili.com/uploads/image/files/nuzevun.pdfIn PDF document text
- https://tiemhoamo.tiemhoahaibara.com/data/dulieu/files/11671265494.pdfIn PDF document text
- https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c2c769c8d---74230647596.pdfIn PDF document text
- http://vytvarnyobchod.cz/UserFiles/File/bikunobumebokamaxe.pdfIn PDF document text
- https://panama4d.com/contents/files/15440776406.pdfIn PDF document text
- http://ohana1bbq.com/uploads/files/81172333223.pdfIn PDF document text
- https://easresidence.ro/app/webroot/files/userfiles/files/22155164220.pdfIn PDF document text
- http://consol.hu/images/uploadedimages/file/5630356984.pdfIn PDF document text
- http://xn----dtbhwhggdaoqfh3d.xn--p1ai/media/file/visinosusuxafekujoba.pdfIn PDF document text
- http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/fulogalegemivovun.pdfIn PDF document text
- https://pierreseche.fr/userfiles/file/7763268663.pdfIn PDF document text
- https://barrierball.cl/ckfinder/userfiles/files/70669352843.pdfIn PDF document text
- http://hstairan.com/FCKeditor/editor/filemanager/connectors/php/userfiles/file/jujuzinuv.pdfIn PDF document text
- http://salman-is.com/userfiles/file/35127560048.pdfIn PDF document text
- https://baigiangtoanhoc.com/upload/files/72701903553.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=standard+progressive+matrices+manualPDF 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_off0000b0ec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB0EC	14640 bytes
SHA-256: `e875221721dd5fa1906dd8ff89f1fefdbfb812e35066d36d85104ffd4f84a562`
`font_01_sfnt_off0000d5b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD5B4	11096 bytes
SHA-256: `e87b57c73bcc3710d582f3f3e6fa279f7eca30d47a7fed2f2d925b6acfbe64d2`
`font_02_sfnt_off0000ef60.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF60	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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