PDF malware analysis — malicious · 83aba0130e6a93eb

MALICIOUS

PDF

81.3 KB Created: 2021-06-26 18:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 5f0fc98c309af7dab76b3ef94d6c9f7d SHA-1: 827f280082090db627f950b7f6d98256b3e8eb08 SHA-256: 83aba0130e6a93ebdf66e9604699fa623c87a3f33926c940e055529c556b35ca

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, pointing to numerous URLs hosted on potentially compromised or disposable domains. These links are likely designed to lure users to phishing sites or download further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

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://angkortaxiservice.com/userfiles/file/12201827363.pdf In PDF document text
- https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/920f2eee972a34badfec7326e65de0a2/nexunapupugora.pdfIn PDF document text
- http://yuanjen.com/ckfinder/userfiles/files/10168464884.pdfIn PDF document text
- https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/e04q5f6596fln835uahkai0soo/80328816.pdfIn PDF document text
- http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfbbbc1b43---bekijufotufudeteb.pdfIn PDF document text
- https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/1b2cb6d9c1c91c1bb3b3b7937ec4086f/13589401362.pdfIn PDF document text
- https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/474af8732cdadb6e16c9280723e13e47/2774070576.pdfIn PDF document text
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608334e064824---32010497740.pdfIn PDF document text
- http://martom24.pl/martom/userfiles/file/ronanakubapijelewox.pdfIn PDF document text
- https://tkquiz.com/userfiles/file/9591556541.pdfIn PDF document text
- https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d032498029---23629628902.pdfIn PDF document text
- http://agrobud.net/uploaded/file/jukago.pdfIn PDF document text
- https://damiel.eu/userfiles/file/zodesojubisi.pdfIn PDF document text
- https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/b07b16ed0c2a9e14818da1a63043d2ec/95928329328.pdfIn PDF document text
- http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d55664c08---74340430706.pdfIn PDF document text
- https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a725771449f---86707530713.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c908600d876---66174630688.pdfIn PDF document text
- https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609863a6f208f---90972764741.pdfIn PDF document text
- http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/277b6d26efe1643b4be8167e7bfd54e6/puvafoj.pdfIn PDF document text
- http://ehs1958.org/clients/73155/File/7096659282.pdfIn PDF document text
- http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbfc487c06---navolimes.pdfIn PDF document text
- http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16085230df3647---juzujeputiniloxemikar.pdfIn PDF document text
- https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/af17ac1701770d7560e228664f94752e/97917802235.pdfIn PDF document text
- http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160becb389d578---78378293903.pdfIn PDF document text
- https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecac2f17f0---memijetajoniwupuzo.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/091e1ca447a32df78de6d70e22f288c7/petevotenewi.pdfIn PDF document text
- https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e000dc1ad0---37833235976.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=manini+meaning+in+englishPDF 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_off0000d866.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD866	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f078.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF078	18048 bytes
SHA-256: `6eb40653d03f075aee114e45aa794688d1b2c1853ccc49ec0b495c5e7741a1f3`
`font_02_sfnt_off00011fa2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FA2	10232 bytes
SHA-256: `41a8f3e0ba5f84a75481cd84aaf9771d4f8e63f6630d493698a66930858648b6`

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