PDF malware analysis — malicious · ebe9254976b95f21

MALICIOUS

PDF

76.2 KB Created: 2021-07-02 11:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: eff3b24145a3b1196a6c89f51e104f6e SHA-1: 304c323784bd95f4037d5fe5789cebb79feb3b23 SHA-256: ebe9254976b95f21398f8bc73b742314be9fd9bb4b100f6fff8b92f7d5a8deaa

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting it functions as a link farm. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9827

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://inwebjor.ru/uplcv?utm_term=how+to+pick+a+lock+with+a+key PDF link annotation
- https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/2fdf5fcb053645523be9938467d2be6f/votekuvasukut.pdfIn PDF document text
- http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984c534d134---fapapogalip.pdfIn PDF document text
- https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/b1936b86376a4c87b6573803513c5a0d/mipud.pdfIn PDF document text
- https://apskarota.org/userfiles/file/wuverulibenelewexunibigak.pdfIn PDF document text
- http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f067b4e5d---nepiper.pdfIn PDF document text
- https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/gd08scagb19esj3ork75eeruad/15011775193.pdfIn PDF document text
- https://actaviaserica.org/board/file/files/firesejumugetajodivab.pdfIn PDF document text
- https://ukmalayalamnews.com/userfiles/file/4935961792.pdfIn PDF document text
- http://marcth.pl/media/fck/file/wexat.pdfIn PDF document text
- https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/f3bf87ffa36a58ffab7109c6ac793240/73543607740.pdfIn PDF document text
- http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a33c34263---filagiduxumijubebokotizox.pdfIn PDF document text
- https://congchung7.com/upload/file/34028450390.pdfIn PDF document text
- https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160931d6c8d697---zaravujowinef.pdfIn PDF document text
- https://jodhpurtravels.com/nbloom/fckuploads/file/kijapabunosojusad.pdfIn PDF document text
- http://daiichilogistics.com/uploads/news_file/xojamalipusuvirif.pdfIn PDF document text
- http://ixtvs.de/_upload_bilder/_filemanager/file/faxilarojarodafagufupavi.pdfIn PDF document text
- https://clubslotalmatriche.com/calcas/file/warojefuxokojonagisobal.pdfIn PDF document text
- https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d083f29ddd1---mejuvuwovegalevivizo.pdfIn PDF document text
- https://bbgpiti.com/userfiles/files/voxujepuzolivuwajetuniku.pdfIn PDF document text
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/d58d55b432fe525b887b22d605fcbe5f/78036406455.pdfIn PDF document text
- https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/f429ceabaef9615837d4a550d6d30db9/80141972570.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160712e4fb33d0---87275238879.pdfIn PDF document text
- https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/idfqjf5ih7a0jfsbecglt3k36g/52327576696.pdfIn PDF document text
- http://etre-belle.su/images/file/vigapegutofipifilumuxafu.pdfIn PDF document text
- https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/6efad2afb2b9baa2048a7be3b891c2f3/2833302495.pdfIn PDF document text
- http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/jidebidefujewu.pdfIn PDF document text
- https://systematix.pl/userfiles/file/75042661982.pdfIn PDF document text
- https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a85bc097c12---44849613525.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_off0000cb21.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB21	10380 bytes
SHA-256: `33ecbe594849c2c58244431f5ff81a81bf743f69a106ea7bc209bff918e890f6`
`font_01_sfnt_off0000e2cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2CF	15844 bytes
SHA-256: `c7cadd825ea794ab597163b639f0a4c4a76f61d71d672bed8f5533eb208eb6f7`
`font_02_sfnt_off00010b57.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B57	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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