PDF malware analysis — malicious · 340af00bb6028738

MALICIOUS

PDF

96.2 KB Created: 2021-06-26 21:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: f26a589b648d74ecfc16c4a4b7a7e12c SHA-1: a70e7d1b0cae51b8d7b1f5bff2e69d00bda00f6d SHA-256: 340af00bb6028738a3d27bdbae55e6047df934a3c24b5d0994093867cbce72d0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to phishing or malicious content. The PDF structure and embedded content indicate it's likely part of a phishing campaign, potentially using embedded JavaScript to facilitate the redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9936

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://catamma.ru/uplcv?utm_term=lady+on+the+train+hitchcock PDF link annotation
- http://bocghebinhduong.com/media/ftp/file/14863742791.pdfIn PDF document text
- http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16075572d7500c---91541614026.pdfIn PDF document text
- https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/dv9b37hlvjcf2togghnk6n1ksf/lazovusefi.pdfIn PDF document text
- http://bjhtdszdh.com/v15/Upload/file/202151377416103.pdfIn PDF document text
- http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16082e8275d316---68534574605.pdfIn PDF document text
- http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b649702a472---99127484566.pdfIn PDF document text
- https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae27998cbc5---runurazulunuborurebek.pdfIn PDF document text
- http://edumedcare.pl/upload/files/43158738272.pdfIn PDF document text
- http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a61c155a0cd---vubeg.pdfIn PDF document text
- https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/hub9cr05epu27ta4kbjhrl02ba/werira.pdfIn PDF document text
- https://client-sms.com/ckfinder/userfiles/files/49593912889.pdfIn PDF document text
- http://architettosirocco.it/userfiles/files/44095159225.pdfIn PDF document text
- http://hysansam.com/fckeditor/userfiles/image/71371942381.pdfIn PDF document text
- http://anvlaw.com/userfiles/file/40727025731.pdfIn PDF document text
- https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/93334cc433da2c030fb3a84c10956362/49028100981.pdfIn PDF document text
- http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791ceb62450---49610928176.pdfIn PDF document text
- http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/wezojuruvimal.pdfIn PDF document text
- http://alliance-ltd.com/userfiles/53367695832.pdfIn PDF document text
- https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/bd1e640b14fa483d809ce39d7a636856/zesuroramusabibimeva.pdfIn PDF document text
- https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/9732f95a51661823cab615e148b4f543/jaruzoxanozubixojunuriko.pdfIn PDF document text
- https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/fad6f17a5dbb85856ff00a47c0bd9bd0/zurure.pdfIn PDF document text
- http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609401239a8ae---98904469724.pdfIn PDF document text
- https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/p85c1231f6be61j5pjbh5gpqj3/nogiparapepu.pdfIn PDF document text
- https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0078c3ba3---mofunuru.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_off00011701.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11701	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00012f18.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12F18	10416 bytes
SHA-256: `38ad9123894507eb57973886ae143aaad6b0d959c4a61d5f2134a87d1c7e5ade`
`font_02_sfnt_off00014696.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14696	17388 bytes
SHA-256: `4bb643ff4fa5dcc57dea39b65389b3dae98e7605f6a56362e4270bfbdf435a0c`

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