PDF malware analysis — malicious · d52d680b4c9340b0

MALICIOUS

PDF

80.4 KB Created: 2021-09-23 15:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 7f4723887dc0c56e5e3a0ab5fa0b1a36 SHA-1: 360ad84bfb361f5ece6835843c277bcf84fa28d9 SHA-256: d52d680b4c9340b01b05005a6e80b1eeb624d71943af615b03b976347abf0a6a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous external URIs, many hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term=save+app+passwords+on+android' in one URL hints at a potential phishing lure related to account security.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://ketchas.ru/uplcv?utm_term=save+app+passwords+on+android PDF link annotation
- http://alphamarino.kz/images/news/file/7065993384.pdfIn PDF document text
- http://tareeapartment.com/user_img/files/11144701463.pdfIn PDF document text
- http://sartoriaventurini.com/userfiles/files/loxomizemibekoligafoxun.pdfIn PDF document text
- https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/75e6cfd4e4bcaa2dd215aa3af22d7e85/39045746305.pdfIn PDF document text
- http://colorsoftexas.com/ckfinder/userfiles/uploads/turanazobonorefokipe.pdfIn PDF document text
- http://lionsmarsala.it/userfiles/files/30410355845.pdfIn PDF document text
- http://meandnetworking.com/ckfinder/userfiles/files/denogofakekimojuj.pdfIn PDF document text
- http://snieznik.pl/userfiles/file/xikuzulewidabevirudoje.pdfIn PDF document text
- http://sevennews.com.br/ckfinder/userfiles/files/39696627719.pdfIn PDF document text
- http://hotel-gerard-dalsace.com/upload/document/44510189702.pdfIn PDF document text
- http://cortocircuito.trialpanel.com/images/Upload/files/96972710348.pdfIn PDF document text
- https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/3anrr4rordscqqbr5hsikoveq6/83277927515.pdfIn PDF document text
- http://vasekurzy.cz/userfiles/file/54806123576.pdfIn PDF document text
- http://princeverma.in/uploads/files/6886109092.pdfIn PDF document text
- http://ilkconstruction.com/Images/Media/files/lurinowaxolewe.pdfIn PDF document text
- http://baltyk.recykling-rejs.pl/imgturysta/files/46728189578.pdfIn PDF document text
- http://giaydantuongphongngudep.com/images/news/file/3411953473.pdfIn PDF document text
- http://balade-pierry.fr/userfiles/file/20652681047.pdfIn PDF document text
- http://chongros.com/userData/board/file/luropemujosiraj.pdfIn PDF document text
- https://triptoboloyfoundation.org/editorsfiles/files/lufujefegev.pdfIn PDF document text
- https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16135866cadcb6---wumijikipazeranilav.pdfIn PDF document text
- http://falconartistmanagement.com/ckfinder/userfiles/files/benuzujaminizu.pdfIn PDF document text
- https://strongpointmarketing.net/userfiles/file/59826517758.pdfIn PDF document text
- http://showpelec.com/data/file/20210912_040229_823.pdfIn PDF document text
- http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16145cd5d6e5aa---61751590006.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_off0000d834.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD834	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f04b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF04B	10468 bytes
SHA-256: `40413d356484f0c03779279b36ca5aa0a349e64a24d645a47b1a18cf4524db09`
`font_02_sfnt_off00010829.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10829	17116 bytes
SHA-256: `8b8d6e9502c66b9ed3e4a7c7495f0c82bea93d5fcf198a29fa87ee9399aa66c0`

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