PDF malware analysis — malicious · 1605163ae624f11e

MALICIOUS

PDF

81.4 KB Created: 2021-09-08 09:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: a88f574f36525166fc23ceb29577567b SHA-1: 7053b4e251046c3e2c629474c98f932c90e4e460 SHA-256: 1605163ae624f11e400483fcb95335dab8aa3a80704058d40b482905f23514a0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS upload directories. These links likely serve to distribute further malware or lead users to phishing sites, aligning with the characteristics of a phishing or downloader campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/2fb6630a2c81bc08d6644f6bed7eca25/foriro.pdf In PDF document text
- https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9441a8c127---59549445808.pdfIn PDF document text
- https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a6f6f36633---legugaburuvufekofibiti.pdfIn PDF document text
- http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160770bb47b425---jaregesukowonotofomuz.pdfIn PDF document text
- http://101-games.ru/images/uploads/files/31621635895.pdfIn PDF document text
- http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad17b81987---25005878622.pdfIn PDF document text
- https://zoorichi.com/temp/fckeditor/file/roxubeviwaxogunosabujumad.pdfIn PDF document text
- https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db5d2bbed63---xejamepozesinavi.pdfIn PDF document text
- https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/25814e6f25e769636796d6e312b3481b/83553299378.pdfIn PDF document text
- http://ms-beauty.com/ckfinder/userfiles/files/47968445281.pdfIn PDF document text
- http://hengtaixin.com/HangShun/ckfinder/userfiles/files/roguber.pdfIn PDF document text
- https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/ec73b1cf6a2da53078191cf4a98181f2/4744849461.pdfIn PDF document text
- https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/dc0a0215a61060de848857dc6fa75761/80846795142.pdfIn PDF document text
- http://massageindex.nl/images/uploads/91056686164.pdfIn PDF document text
- https://ehlibeytalimleri.com/resimler/files/firexexegi.pdfIn PDF document text
- http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/8u3t8ekrbitkqeeh0811dj2l8m/4637828743.pdfIn PDF document text
- http://www.leposeur.fr/site/upload/ckfinder/files/53859866506.pdfIn PDF document text
- https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/488dce8d909d954cc8d8ec7cbf3246f2/xiper.pdfIn PDF document text
- https://songhongresort.com/img/files/liminekunixotufogexilibi.pdfIn PDF document text
- http://mlight.cz/archiv/file/22723318717.pdfIn PDF document text
- http://studiodrago.eu/userfiles/files/49167512063.pdfIn PDF document text
- https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4af584188---biwagunefevenedusab.pdfIn PDF document text
- http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075f6f24e0a8---58202511954.pdfIn PDF document text
- http://adice-area.com/pictures/files/kapukelawimukixef.pdfIn PDF document text
- https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5fd2cdfe3b---xutipunewadudufazisebubi.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607efed30c943---lizanenopotiwoxo.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=five+basic+sentence+patterns+worksheetsPDF link annotation
- 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_off0000da4c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA4C	10788 bytes
SHA-256: `ce93088ef9539023b48e8f905da37cdcb128bbe1dab1a927b6201aa8dd961c06`
`font_01_sfnt_off0000f2fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2FB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010b0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B0D	17480 bytes
SHA-256: `43ae90e42486373e16f25a763a9382303228ba8b6c32fd469144c06c90ba9c04`

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