PDF malware analysis — malicious · 204ea63d845e8c0e

MALICIOUS

PDF

96.3 KB Created: 2021-06-30 09:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 3ea06971299a3e3a261aa1ce949f3b74 SHA-1: c65a588a0caf94951a5a2edb9c65fab2de021774 SHA-256: 204ea63d845e8c0e4d97b3d3f34454e763920488c2bb1b0e6f8e8baf7856e4b7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting, likely to distribute phishing content or malware. The presence of external URIs and link farm characteristics strongly suggests an attempt to redirect users to malicious destinations.

Machine Learning

Nyx PDF Classifier malicious score 0.9769

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://cructi.ru/uplcv?utm_term=liver+disease+that+makes+skin+yellow PDF link annotation
- https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/g5lkclvltvmt75c7ck7bm9e154/50084550685.pdfIn PDF document text
- https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd95fb751b---nuzijonapi.pdfIn PDF document text
- https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/bk70tn3pg54t5vqpscpcl4rcdj/88109857378.pdfIn PDF document text
- http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756e79874f7---xerudogemovusideliriz.pdfIn PDF document text
- http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0989ba82fc---lomokorogofuda.pdfIn PDF document text
- https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d05ca57bdd---40630554312.pdfIn PDF document text
- https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/fd2aaf3ae6da668fcfd1855d670dc70b/20723738161.pdfIn PDF document text
- http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160743849caa5e---10986075514.pdfIn PDF document text
- http://hindel-relax.ch/ckfinder/userfiles/files/delurotaxaxibajotubexin.pdfIn PDF document text
- http://baovephuongtroi.com/vietkiendo/upload/file/sinisupurijosumulop.pdfIn PDF document text
- http://bocghedanang.com/media/ftp/file/tusiwikezopekibulew.pdfIn PDF document text
- https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607043fe98fd6---91626159817.pdfIn PDF document text
- http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b82821efd9---gekurodowu.pdfIn PDF document text
- https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/ceb66aa5f0380b31f11f93994fc8ba19/22470960172.pdfIn PDF document text
- http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7468f576c6---81387914571.pdfIn PDF document text
- http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f2623a708---nofamowokugisenelarom.pdfIn PDF document text
- https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/62fc0cad4136255a43f9b10f2009c5d9/14354671538.pdfIn PDF document text
- http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2f0baaf1a---xepori.pdfIn PDF document text
- http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/ikpdkii9l4ia93msab8v6lfoi3/rikiwago.pdfIn PDF document text
- http://skiflogistics.ru/userfiles/file/52646732302.pdfIn PDF document text
- https://valve-toho.com/userfiles/file/xupexamen.pdfIn PDF document text
- http://aranykoronakft.hu/userfiles/file/migodosumewolemotufokamij.pdfIn PDF document text
- https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947701ebe2d---sonagoxekomixirino.pdfIn PDF document text
- https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/dhdsfkpjqrnmfj3jd03rd7hel4/besop.pdfIn PDF document text
- http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a418ef4ac4f---18997538082.pdfIn PDF document text
- http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c18cc54301b---83525287723.pdfIn PDF document text
- https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/bb49e9c6e774bbabcecd096b4a58c49c/75880718696.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_off0000ff67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF67	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011779.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11779	17156 bytes
SHA-256: `1ad078d1978ff2e823963874c881f2376fc4d259665b81531086f9503bb5e285`
`font_02_sfnt_off000144b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x144B0	16092 bytes
SHA-256: `98bcec2be85b547d266a48c61dccc50816b624367bf69e2f194f2b8087d010f5`
`font_03_sfnt_off000159f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x159F2	10828 bytes
SHA-256: `f3bff5a58274c66af55a623fd146e5fb8a6ab33d39e53dec3ad84356964bdc79`

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