PDF malware analysis — malicious · 9a4e597be6fafeb9

MALICIOUS

PDF

70.8 KB Created: 2021-09-13 06:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: e0cab0fec338a0cf3306a799c77fe1d3 SHA-1: 3d238ee2caf95834ba50ade63b1fb106b13e3d82 SHA-256: 9a4e597be6fafeb900a8a272cd8e59fb3a316e91c37ba9e0d399cfa604ab98a7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support the conclusion that this document is intended to lead users to potentially harmful external content.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

Heuristics 6

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.
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=watch+movie+online+bollywood+2019 PDF link annotation
- https://wspaperbag.com/userfiles/file/zixevapomuvesemigadofu.pdfIn PDF document text
- http://mercuresamuichaweng.com/admin/file/59268869498.pdfIn PDF document text
- http://rafaelokazakov.com/file/90285363123.pdfIn PDF document text
- http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/raxiza.pdfIn PDF document text
- https://kimcert.org/E/file/87899023749.pdfIn PDF document text
- http://airconbank.com/upload/fckeditor/file/91458502930.pdfIn PDF document text
- https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16133f977a07a4---lafam.pdfIn PDF document text
- http://www.gabrielamaciel.net/images/content/file/50440106691.pdfIn PDF document text
- http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613cbf3a60db2---baxurojivavovotegolu.pdfIn PDF document text
- http://finchamauto.com/pics/17289370694.pdfIn PDF document text
- http://bakineshr.az/ckfinder/userfiles/files/bidol.pdfIn PDF document text
- http://assotechne.eu/userfiles/files/damapazuvufurixixar.pdfIn PDF document text
- http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/bejuvujidijafokude.pdfIn PDF document text
- http://saluteebenesseresas.it/userfiles/files/85308658216.pdfIn PDF document text
- https://btsis.com/upload/ckfinder/files/14282219400.pdfIn PDF document text
- http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134bda92d731---30115019625.pdfIn PDF document text
- https://qpshouse.com/upload/image/file/89859806749.pdfIn PDF document text
- https://fratellifurloni.it/file/wodetiva.pdfIn PDF document text
- http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8414d34f6---12014315452.pdfIn PDF document text
- https://mosaicopeoplecorporation.com/ckfinder/userfiles/files/jesebas.pdfIn PDF document text
- https://hygradeinsulators.com/images/uploads/file/57074064897.pdfIn PDF document text
- https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/cc3787022a1daba5c82415f4589e800b/wosivobusoratupadolebagi.pdfIn PDF document text
- http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f70e78cdf2---jovokabades.pdfIn PDF document text
- https://mosallaesf.ir/uploads/ck/files/53261729826.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_off0000b2fc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB2FC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000cb13.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB13	11228 bytes
SHA-256: `ecbc78dd3dffda909499bdab5e3cfbbf97e9b391d523ef88f29b02ac235955bb`
`font_02_sfnt_off0000e553.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE553	15984 bytes
SHA-256: `aaa89b1a21d499692d013e7c4fa546760dfa47b738a1970eb1220c55672fda6a`

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