PDF malware analysis — malicious · f6192f2752d29bdd

MALICIOUS

PDF

82.4 KB Created: 2021-09-06 19:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 95cda9c0d3455c7d19f04b117db5d62d SHA-1: 1cc1b8e173b71c0737a424b79f13ad61ae2c6533 SHA-256: f6192f2752d29bddb2c3497d30ca90f9556362aea9879226b900abda99ec0ddd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with a malicious link farm designed to lure users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://pistant.ru/uplcv?utm_term=visa+application+form+japan+pdf PDF link annotation
- http://niezapominajkowo.eu/userfiles/file/najirawe.pdfIn PDF document text
- https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/a401c1f6cd8fed5c6153cac5a3e6c364/50333563049.pdfIn PDF document text
- http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d6de4848c---ledaxomowanajituvup.pdfIn PDF document text
- http://olneyjune65.com/clients/d/dc/dcef5d22f85ec69f5810ba62c2e8cf46/File/jukeji.pdfIn PDF document text
- http://verduciautodemolizioni.it/userfiles/file/zarizedipedarevogut.pdfIn PDF document text
- http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a10d9d40ac3---zonaxofelunulene.pdfIn PDF document text
- http://altelaw.com/uploads/image/file/sizigugunarevisapozigu.pdfIn PDF document text
- http://cloverdiamond.com/file/54735615327.pdfIn PDF document text
- https://www.jakketoes.be/ckfinder/userfiles/files/53791091191.pdfIn PDF document text
- https://sssmri.com/ckfinder/userfiles/files/fupozeralifa.pdfIn PDF document text
- https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071049e92f17---51416083446.pdfIn PDF document text
- https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/sl911s63bloggp7rn5f4cpklnr/kabakowetezewonomaz.pdfIn PDF document text
- https://adikkedua.com/contents//files/vemuzofagiririneratowibet.pdfIn PDF document text
- http://www.hydro-tg.pro/upload/file/lugamipuwazug.pdfIn PDF document text
- http://nemeckystrakac.sk/editor_uploads/files/bodopodoriweloruw.pdfIn PDF document text
- http://nguyenphat.com/public/default/ckeditor/files/dupigisijurizowemoku.pdfIn PDF document text
- http://interwork.sk/userfiles/file/35915083028.pdfIn PDF document text
- http://birons.net/wp-content/plugins/super-forms/uploads/php/files/557678dcfd77d0c3b50bbe9c0a21e7ba/20482256089.pdfIn PDF document text
- https://thefertilizergranulator.com/d/files/40682576465.pdfIn PDF document text
- http://yuha.be/_files/file/44070516393.pdfIn PDF document text
- http://rialta.ie/userfiles/files/68775841577.pdfIn PDF document text
- https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ace8c760d---94807300224.pdfIn PDF document text
- https://xn--b8qxb801j.tw/upload/files/zulininelewanago.pdfIn PDF document text
- https://burgas-remonti.com/userfiles/file/92797286473.pdfIn PDF document text
- http://ourconn.com/userfiles/file/202108050241002396.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_off0000dc80.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC80	10748 bytes
SHA-256: `b0b71315681d185a10eeb1f9da50492e95fe8d6f228dde74d9ae1d69566ba0c1`
`font_01_sfnt_off0000f52c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF52C	17896 bytes
SHA-256: `c8623ebd9eeff70bbe90dd7857f6c531b377a9ba61dc8053e2aefa6f6a804ba3`
`font_02_sfnt_off00012369.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12369	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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