PDF malware analysis — malicious · d6bedd508cb33ac6

MALICIOUS

PDF

80.7 KB Created: 2021-09-07 21:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 225e61c838101d461bf5dd5f886f5578 SHA-1: aec2edd24a93ec9d5c2a031afa2b2e3b9f3d9a7b SHA-256: d6bedd508cb33ac6b7e992d6f2022a1c3b743c8eb29c5592052ee8fa13261ce9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and the ML classification strongly suggest this file is part of a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9781

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://infrive.ru/uplcv?utm_term=test+your+english+vocabulary+in+use+upper-intermediate+%26+advanced+pdf PDF link annotation
- https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/13022d6970f3f86d797291a7f3de7b14/17540469246.pdfIn PDF document text
- https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/0ecbe4da7f47d5f0fb30e307563be4b4/vuzebaduxum.pdfIn PDF document text
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/1201c090ab188267982fced71f237492/34262446826.pdfIn PDF document text
- http://bertrandetgastineaudesigners.fr/userfiles/file/ruropijoz.pdfIn PDF document text
- http://pumarecovery.com/userfiles/files/24586033556.pdfIn PDF document text
- https://accidentmatters.com/ckfinder/userfiles/files/xubojisogofajiduwojem.pdfIn PDF document text
- http://www.amedna.com/userfiles/files/71622589732.pdfIn PDF document text
- http://czechdidgeridoo.com/admin/upload/file/pomikujejitikapubevozi.pdfIn PDF document text
- https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a84f7ab152---57280777623.pdfIn PDF document text
- http://location-venise.com/italie_documents/files/wuxuxenozikulerarojotuto.pdfIn PDF document text
- https://condicionamentofisico.com/arquivos/file/43306682969.pdfIn PDF document text
- https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/o260qpctu7j1orpct6a6b28bk5/zevugumonorudexelikamag.pdfIn PDF document text
- http://wecans.net/_UploadFile/Images/file/jokasosubomilepegexopog.pdfIn PDF document text
- http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sorom.pdfIn PDF document text
- http://generaltubi.com/container/ckfiles/files/48464261581.pdfIn PDF document text
- http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b901a3f585---16394380857.pdfIn PDF document text
- https://sunrise-photon.com/upfiles/editor/files/sagaromosibitoramewe.pdfIn PDF document text
- https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607aff2c9cbd9---49366773203.pdfIn PDF document text
- https://fcr-fomentoconsumoerenda.com/uploads/files/memunomagawuw.pdfIn PDF document text
- http://quatanggiabao.com/images/uploads/files/7877792303.pdfIn PDF document text
- http://zulaikhatextile.com/userfiles/files/87582184109.pdfIn PDF document text
- http://anhuishangbiao.com/upload_fck/file/2021-4-30/20210430025939287119.pdfIn PDF document text
- https://powermailer.in/userfiles/file/ferusuwesamozo.pdfIn PDF document text
- https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/4b9de5657aa0895e83753f73e9d436fa/bujifikejugizodegobowadi.pdfIn PDF document text
- http://taxicityplus.ru/userfiles/file/folujutugurasajujominuz.pdfIn PDF document text
- http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/35126608748.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b957.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB957	16316 bytes
SHA-256: `846294805de60e070b6165e5fa866fa07d03e6b7c30baa786c7c8f59eca48491`
`font_01_sfnt_off0000cfaf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCFAF	11376 bytes
SHA-256: `422fcfc8fdda4d8099727ceacd9c26a1ed791a10cd2b528b19566740d0c7b3fc`
`font_02_sfnt_off0000ea01.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA01	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00010213.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10213	20636 bytes
SHA-256: `f9d6517bbd0db026d07608fe4e9961199ded17c07a29acc91bec2ec98c93a830`

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