PDF malware analysis — malicious · 2977e775df5ad622

MALICIOUS

PDF

78.6 KB Created: 2021-09-04 19:12:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 3aabdc4b585b3950df19d7e3708e50e8 SHA-1: fd700357b08115a1a754ba5e1b4353b0fee8ce95 SHA-256: 2977e775df5ad622b9aa6776b166d93505c466d5b1a5c7b54e07effd4f283b7c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the nature of the links and the PDF structure point towards a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://inwebjor.ru/uplcv?utm_term=investigacion+en+psicologia+pdf PDF link annotation
- http://sbairs.com/datas/files/7928770972.pdfIn PDF document text
- https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/12e6bedcb926b7827f84168321b2b258/3764821898.pdfIn PDF document text
- http://cen7dias.es/userfiles/files/7592486748.pdfIn PDF document text
- https://nhatngudongkinh.com/upload/ckupload/files/56599748433.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/008f071b2085a08fe64e57681f0e2c4e/wufakulu.pdfIn PDF document text
- https://bojovicsirogojno.com//files/ginow.pdfIn PDF document text
- https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/5868b638a6f009f929ace2a555dfbaec/1060972800.pdfIn PDF document text
- https://autoprofi.ua/userfiles/file/9557867986.pdfIn PDF document text
- http://symbioticlifetech.org/attfile/fckimg/file///20210604152026_230078219.pdfIn PDF document text
- http://wittzumstegfamilyreunion.com/clients/e/e5/e56c03c63d8c9260b12fda9e5e6a3df6/File/fuvasajozus.pdfIn PDF document text
- https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/5c77edfd3e9be9658f595c656665dc80/69406426211.pdfIn PDF document text
- http://onishi-kyosendo.jp/archive/35292902469.pdfIn PDF document text
- http://zit-tech.com/userfiles/files/68775731542.pdfIn PDF document text
- https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d1ace6da2---jobasudifat.pdfIn PDF document text
- http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/padodutakelimonowonit.pdfIn PDF document text
- http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8ca127f08---12722603782.pdfIn PDF document text
- http://cheers-gifts.com/userfiles/94952657481.pdfIn PDF document text
- http://bettynblue.com/upload/fck_img/20210812/file/malakafaka.pdfIn PDF document text
- https://vico-inmobiliaria.com/ckfinder/userfiles/files/somemadenubemepowaba.pdfIn PDF document text
- https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4f4e8471bb---tevizizuvigumek.pdfIn PDF document text
- https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/1svc9osv4uq0rdj8dfuge2lbq1/99601109087.pdfIn PDF document text
- http://tmacfashion.com/ckfinder/userfiles/files/darud.pdfIn PDF document text
- https://bazab.ru/ckfinder/userfiles/files/menewadakava.pdfIn PDF document text
- http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca61030e42---45993266000.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_off0000cd47.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD47	10712 bytes
SHA-256: `f204ecd05b2721e3a9ac3f2f1950c3e8fb5ad861cea309274b5b6b776e32a66a`
`font_01_sfnt_off0000e5d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5D4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000fde6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDE6	18400 bytes
SHA-256: `3050f1faec2c24da638516c8d03840c7faa690c0e3e15805fc3ca62682382654`

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